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Program in Survey and Data Science

Ann Arbor, MI

Program in Survey and Data Science / Program in Survey and Data Science is located in Ann Arbor, MI, in an urban setting.

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The Global COVID-19 Trends and Impact Survey
Improving the Measurement of Economic Activity
Improving the Design of Mobile Surveys
Improving the Analysis of Complex Data in Social & Bio-Medical Settings
Improving Statistical Methodology with Multiple Complex Big Databases
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Admissions - PhD in Survey and Data Science

Admission Deadline

For best consideration, applications must be received by January 14, 2022.

Admission Criteria

Applicants for admission to the Ph.D. program should hold a Masters degree. Provisional admission status may be granted to candidates with a undergraduate degree and other evidence of outstanding potential.

Complete the University of Maryland Graduate School application form .
Provide an official transcript for all undergraduate and graduate courses
Complete an essay describing their experience and interest in survey methodology
Submit three letters of recommendation

Qualifying Exam

Qualifying examinations will be given to all students seeking the Ph.D. These will generally be taken by the end of the first year of the student's enrollment in the program. The goal of the examination is to assure that all Ph.D. students share a basic foundation of the interdisciplinary knowledge important to Survey and Data Science. The Ph.D. advisor assigned to the student will provide counsel on what preparations are needed for the individual student prior to taking the qualifying examination.

The qualifying examination will cover the material treated in courses required of both the statistical and social science concentrations of the M.S. in Survey and Data Science. In addition, it will cover two specialty content areas: one on statistical theory and methods for those Ph.D. students seeking to specialize in statistical science; one on statistical methods and data analysis for those seeking to specialize in the social sciences.

No course work is required prior to taking the qualifying examinations, although many students may choose to take courses to fill gaps in their backgrounds.

Survey and Data Science (online) (MPDS)

Graduate Degree Program College: Behavioral and Social Sciences

The Joint Program in Survey Methodology (JPSM) blends together faculty with diverse disciplinary backgrounds all devoted to teaching state-of-the-art practices in the statistical and methodological aspects of surveys and data. The program's faculty primarily come from the University of Maryland, University of Michigan and Westat, supplemented by instructors from a number of federal statistical agencies. Many of these faculty are leading researchers and statisticians in the field of survey methodology, thereby providing an unparalleled educational experience to the students. JPSM's offerings include onsite PhD and Master’s degrees as well as online Certificates and a Professional Master's degree.

Jody Williams Joint Program in Survey Methodology 1218S LeFrank Hall 7251 Preinkert Drive University of Maryland College Park, MD 20742 Telephone: 301.314.7911 Email: [email protected]

Website: https://jpsm.umd.edu

Courses: SURV

Relationships: Intermediate Survey Methodology (Z011) Survey Methodology (SURV) Survey Statistics (Z010)

General Requirements

Statement of Purpose: Complete a one-page essay describing relevant work experience, interest in survey and/or data science, and expected benefits of enrolling in this degree program. (Uploaded to the Statement of Purpose in the application.)
Transcript(s): Should show previous coursework or knowledge in mathematical/applied statistics demonstrated by completion of 6 credits of applied statistical methods courses covering content from probability theory through basic regression techniques (including both OLS and logistic regression)
TOEFL/IELTS/PTE ( international graduate students )

Program-Specific Requirements

Supplementary Application
Supplementary Application Two: Prerequisites
Description of Research/Work Experience (optional)

*Visa Eligibility: This program is not eligible for I-20 or DS-2019 issuance by the University of Maryland.

Applicants must have earned a four-year baccalaureate degree from a regionally accredited U.S. institution, or an equivalent degree from a non-U.S. institution. Applicants must have earned a 3.0 GPA (on a 4.0 scale) in all prior undergraduate and graduate coursework.

Application Deadlines

Resources and links:.

Program Website: http://jointprogram.umd.edu/ Application Process: www.gradschool.umd.edu/admissions

Survey and Data Science, Master of Professional Studies (M.P.S.)

Training will be provided by permanent and adjunct faculty in the University of Maryland's Joint Program in Survey Methodology. Online lectures will be conducted via accessible video conference systems and Webinar tools.

Students will be instructed that to fully participate, they will need to purchase a webcam and headset with a microphone, and have a reliable computer and Internet access. Recorded lectures will be posted online at announced times and will be available online at any time thereafter during the course. Weekly discussions or help sessions will be held at scheduled, fixed times once per week.

As officially admitted students to the University of Maryland, students in this program will have access to all University resources that are accessible in the online environment. Students in online programs are assessed an online student services mandatory fee which supports access to these University resources.

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2024 NHFP Fellows

Meet the 2024 nasa hubble fellowship program fellows, jaren ashcraft.

Host Institution: University of California, Santa Barbara

Proposal Title: Optimizing the Vector Field for Next-generation Astrophysics

Jaren Ashcraft grew up on the Big Island of Hawai'i. He earned his bachelor’s degree in optical engineering from the University of Rochester in 2019, and master’s in optical sciences from the University of Arizona in 2022. Jaren is currently pursuing his doctorate in optical sciences at the University of Arizona supervised by Dr. Ewan Douglas, and will graduate in the summer of 2024.

As a Sagan Fellow at UCSB, Jaren will study how optical polarization can limit the ability of next-generation observatories to directly image Earth-like exoplanets. This phenomenon, known as polarization aberration, is particularly problematic for the ground-based 30-meter Extremely Large Telescopes and the future space-based Habitable Worlds Observatory. Jaren will construct integrated optical models to assess the sensitivity of coronagraphs to the polarization aberrations of these observatories. He will then explore strategies to mitigate the influence of polarization aberrations on astronomical observations, including investigating novel technologies like metasurfaces and liquid crystals to serve as compensators.

Vishal Baibhav

Host Institution: Columbia University

Proposal Title: Dancing with Black Holes: Harnessing Gravitational Waves to Understand the Formation of Black Holes

Vishal Baibhav grew up near New Delhi, India. He earned his bachelor’s degree in engineering physics from the Indian Institute of Technology, Guwahati in 2016. In 2021, he earned his doctorate from Johns Hopkins University under the supervision of Professor Emanuele Berti. His research focused on black hole spectroscopy and gravitational-wave astrophysics. Currently, he is a CIERA postdoctoral fellow at Northwestern University.

Despite breakthrough detections of compact-object mergers by LIGO, Virgo, and Kagra detectors, the birthplace and the origin of these compact objects remain unknown. Vishal's research is focused on fundamental questions such as how, when, and where these binaries form, and what physics drives their evolution. He is interested in understanding the life of stars that evolved into merging black holes and the environments that nurtured them. With future gravitational-wave detections, Vishal aims to address key questions about the formation of compact objects, specifically how black holes and neutron stars acquire their spins. As an Einstein Fellow, he will explore whether these spins are inherited from progenitor stars, or if stochastic processes and natal kicks during core collapse play a significant role in shaping them.

Kiersten Boley

Host Institution: Carnegie Earth and Planets Laboratory

Proposal Title: Identifying the Key Materials for Planet Formation and Evolution

Kiersten Boley grew up in Rome, Georgia. She earned her associate’s in physics at Georgia Highlands College before transferring to Georgia Institute of Technology where she earned her bachelor’s in physics in 2019. Kiersten earned a master’s degree in astronomy at The Ohio State University in 2021. She spent 2022 as an IPAC visiting graduate student at Caltech, working with Dr. Jessie Christiansen. Currently, Kiersten is a National Science Foundation Graduate Research Fellow at The Ohio State University where she will earn her doctorate in astronomy in May 2024, advised by Professor Ji Wang, Professor Wendy Panero, and Dr. Jessie Christiansen.

Kiersten’s research investigates how elemental abundances impact planet formation and interior evolution through planet detection and interior modeling. Her interdisciplinary research aims to determine the materials required for planet formation by planet type and how their mineral compositions may impact the long-term evolution and habitability of rocky planets. As a Sagan Fellow, Kiersten will continue to study exoplanets through population studies focused on unraveling the dependence of planet formation on galactic location and stellar abundance using observational data. Additionally, she will investigate the long-term evolution and water cycling on rocky planets using theoretical interior models based on experimental data.

Michael Calzadilla

Host Institution: Smithsonian Astrophysical Observatory

Proposal Title: A Multiwavelength View of the Evolving Baryon Cycle in Galaxy Clusters

Michael Calzadilla grew up in Tampa, Florida. As a first-generation college student, he earned his bachelor’s degree in physics from the University of South Florida in 2015. He subsequently crossed the pond to complete a master’s degree in astronomy as a Gates Cambridge scholar under the guidance of Professor Andrew Fabian at the University of Cambridge. Michael will complete his doctorate in physics at the Massachusetts Institute of Technology in May 2024 with his advisor Professor Michael McDonald.

Michael’s work focuses on multiwavelength observations of galaxy clusters to study the baryon cycle that drives the evolution of all galaxies. The largest galaxies residing in these clusters grow via material cooling from their hot atmospheres, which is balanced by feedback from star formation and active galactic nuclei. As part of the South Pole Telescope collaboration, Michael’s work is among the first to leverage recent Sunyaev-Zeldovich-based detections of galaxy clusters to observe this cycling of material out to unprecedented redshifts.

As a Hubble Fellow, Michael will develop machine learning techniques for characterizing the thousands of galaxy clusters being discovered by next-generation cosmological surveys resulting in clean, unbiased samples of the earliest galaxy clusters. Using synergies with large X-ray, optical, and radio datasets, he will seek to answer when galaxy clusters first dynamically relaxed, and how the effectiveness of supermassive black hole feedback has changed over time. He will also use new observatories for more targeted follow-up to investigate the role of feedback-induced turbulence in regulating galaxy growth.

Sanskriti Das

Host Institution: Stanford University

Proposal Title: Where the Energetic Universe Meets the Hot Universe

Sanskriti grew up in India and earned her bachelor’s in physics at Presidency University Kolkata in 2015, and her master's in physics at the Indian Institute of Technology Bombay in 2017. She earned her doctorate in astronomy from The Ohio State University, USA in 2022. Since then, she has been an independent postdoctoral fellow at the Kavli Institute for Particle Astrophysics and Cosmology at Stanford University.

Sanskriti is interested in the co-evolution of galactic disks and the circumgalactic medium (CGM) through multiphase gas cycles between the disk and the CGM. Faint diffuse CGM signals tend to hide behind bright, variable, and complex backgrounds. Sanskriti devises innovative observing strategies and develops novel data reduction and analysis techniques to extract that signal. Using millimeter and X-ray telescopes, she looks for the hot CGM, the reservoir of baryons, metals, and energy missing from the stars and interstellar medium (ISM). She studies cold CGM using radio telescopes, looking for the accreting raw material for star formation that is missing from the ISM. She uses multiwavelength (radio, UV, optical, IR, and X-ray) data to study the corresponding galactic disks and connect their properties with the CGM. She is passionate about the history of astronomy and is actively involved in mentoring, outreach, and resolving gender inequity in astronomy as well.

As a Hubble Fellow, Sanskriti is excited to unravel the integrated impact of galactic feedback on the CGM using multiwavelength observations, and inform the next generation of millimeter and X-ray missions.

Jordy Davelaar

Host Institution: Princeton University

Proposal Title: Unraveling the Physics of Accreting Black Hole Binaries

Jordy Davelaar was born and raised in The Netherlands in a small country village called De Klomp. He obtained his bachelor’s and master’s degrees in physics and astronomy at Radboud University in Nijmegen. In 2020, Jordy earned his doctorate in astrophysics from Radboud, where he worked under the supervision of Monika Mościbrodkza and Heino Falcke. After graduation, he has been a joint postdoctoral fellow at Columbia University and the Flatiron Institute’s Center for Computational Astrophysics.

Jordy’s primary research focus is modeling the emission produced in the accretion flows of supermassive black holes. To this end, he combines high-performance computing magnetofluid simulations with radiation transfer methods. His work on black hole accretion flows is used to interpret millimeter, near-infrared, and radio observations, e.g. the Event Horizon Telescope Collaboration. More recently, Jordy started developing binary black hole models, aiming to predict electromagnetic signatures of Laser Interferometer Space Antenna targets with Chandra, XMM-Newton, and Athena.

A critical component to understanding where and how black holes merge and how they shape galactic evolution is host galaxy identification, which relies on electromagnetic observations. However, the field is still debating major theoretical uncertainties regarding the interaction of the binary with its environment and the potential signatures it might produce. As an Einstein Fellow at Princeton University, Jordy will develop novel accretion flow simulations of merging black hole binaries to identify tell-tale electromagnetic signatures and unravel the physics of accreting black hole binaries.

Alexander Dittmann

Host Institution: Institute for Advanced Study

Proposal Title: Bridging the Gap in Supermassive Black Hole Binary Accretion - From Simulation to Observation

Alexander Dittmann grew up in northern Virginia. He earned undergraduate degrees in physics and astronomy from the University of Illinois in 2018, after which he joined the Astronomy Department at the University of Maryland. He has also worked at Los Alamos National Laboratory and the Center for Computational Astrophysics, and will complete his doctorate under the guidance of Cole Miller in April 2024.

Following his broad interests in high-energy astrophysics and fluid dynamics, Alexander has studied a variety of astrophysical topics from the origins of planetary spins to the final moments of binary supermassive black holes. He has also used data from NASA’s NICER telescope to measure the radii of neutron stars, gleaning insight into the enigmatic nature of matter within their cores. As an Einstein Fellow at the Institute for Advanced Study, he will leverage cutting-edge simulations and his experience in astrostatistics to connect theoretical studies of binary black holes to the forthcoming bounty of time-domain observations of active galactic nuclei.

Cristhian Garcia-Quintero

Host Institution: Harvard University

Proposal Title: Phenomenological Modified Gravity in the Non-linear Regime and Improving BAO Measurements with Stage-IV Surveys

Cristhian Garcia-Quintero was born and raised in Culiacán, Sinaloa, México. He earned his bachelor’s degree in physics from the Autonomous University of Sinaloa in 2017. While still an undergraduate student, Cristhian was selected for an internship program, co-funded by the U.S. embassy in Mexico, allowing him to conduct research at The University of Texas at Dallas, where he returned to pursue his doctorate in physics in 2018 under the guidance of Professor Mustapha Ishak.

Cristhian's research is focused on large-scale structure analyses to improve our understanding of cosmology using ongoing and upcoming galaxy surveys. Cristhian is interested in testing the standard model of cosmology using current and future cosmological data while particularly emphasizing phenomenological modified gravity tests and data-driven approaches. Cristhian is heavily involved in the Dark Energy Spectroscopic Instrument (DESI) where he has contributed to the Baryons Acoustic Oscillations (BAO) analysis. Cristhian is also working towards performing cosmological analyses based on cross-correlations between DESI and other surveys.

As an Einstein Fellow, Cristhian will extend his work on modified gravity to explore tests of gravity beyond the linear regime. Additionally, Cristhian will work towards improving the BAO measurements for DESI year 5 analysis and perform analyses that can benefit from synergies between Stage-IV surveys.

Amelia (Lia) Hankla

Host Institution: University of Maryland, College Park

Proposal Title: Explaining Radio to X-ray Observations of Luminous Black Holes with a Multizone Outflowing Corona Model

Lia Hankla grew up in Lafayette, Colorado. She earned her bachelor’s degree in physics and a minor in oboe performance from Princeton University in 2017 and then spent a year in Heidelberg, Germany as a Fulbright Research Scholar at the Max Planck Institute for Astronomy. In 2018, Lia returned home to Colorado for her doctorate in physics, where she collaborated with Jason Dexter, Mitch Begelman, and Dmitri Uzdensky with the support of an NSF Graduate Research Fellowship. After completing her doctorate in the summer of 2023, Lia joined the University of Maryland, College Park as a Joint Space-Sciences Institute Postdoctoral Fellow and a Multimessenger Plasma Physics Center Fellow.

Lia is interested in anything involving plasmas and black holes, especially accretion disks and their surrounding coronae. Although these plasmas just outside the event horizon hold the key to unraveling how black holes evolved over time, they remain poorly understood because of the difficulty connecting small-scale particle processes to the global scales of the entire accretion disk and corona. Interpreting observations of radio to X-ray emission from around luminous black holes requires understanding how and where magnetic energy dissipates into plasma particle energy.

As an Einstein Fellow, Lia will decipher how these dissipation processes, including turbulence and magnetic reconnection, can further our understanding of nonthermal particle acceleration and winds in accretion disks and coronae. Her research aims to shed light on recent spectral timing and X-ray polarization observations of both stellar-mass and supermassive black holes, and to resolve long-standing questions regarding these mysterious objects in our universe.

Cheng-Han Hsieh

Host Institution: The University of Texas at Austin

Proposal Title: A Deep Dive into the Early Evolution of Protoplanetary Disk Substructures and the Onset of Planet and Star Formation

Cheng-Han Hsieh grew up in Taichung City, Taiwan, and earned his undergraduate degree in physics from National Tsing Hua University in 2018. He stayed at Yale for his graduate studies and will complete his doctorate in the summer of 2024 under the supervision of Professor Héctor G. Arce.

Cheng-Han’s research focuses on using the Atacama Large Millimeter/submillimeter Array (ALMA) to characterize the substructure evolution within protostellar disks, where young stars and planets are forming. These substructures manifest varied natures - some potentially sculpted by pre-existing planets, while others, such as dense rings, may act as nurseries for the formation of planetesimals and subsequent planet generations. In particular, he is interested in pinpointing the early formation of disk substructures, which traces the onset of planet formation. As a Sagan Fellow at the University of Texas at Austin, Cheng-Han will undertake a comprehensive statistical study of disk substructures around the youngest protostars, discerning the relationship between circumstellar disk properties and the primordial conditions of planetary systems. Ultimately, he aims to chart the full trajectory of giant planet formation.

Proposal Title: The Role of Magnetic Fields in Galaxy Cluster's Diffuse Structure Formation

Yue Hu grew up in Yuxi City, Yunnan, China. He earned dual bachelor’s degrees in automation engineering from Tongji University and the University of Bologna in 2018. Yue is poised to earn his doctorate in astrophysics from the University of Wisconsin-Madison in spring 2024, supervised by Professor Alexandre Lazarian. During his doctorate, he developed innovative techniques for tracing 3D magnetic fields across various astrophysical conditions.

Yue's research focuses on the ubiquitous turbulence and magnetic fields in astrophysics, bridging the gap from the microscopic physics of cosmic rays to the macroscopic evolution of galaxy clusters. His work employs a blend of MHD turbulence theories, numerical simulations, and physics-informed machine-learning approaches. He has mapped the megaparsec-scale magnetic field in the El Gordo cluster using the synchrotron intensity gradient technique and MeerKAT radio observations.

As a Hubble Fellow, Yue will explore the role of magnetic fields in the evolution and formation of galaxy clusters, using cosmological simulations, and radio observations from VLA, LOFAR, and MeerKAT, alongside X-ray observations from Chandra and XMM-Newton. He aims to deepen our understanding of the magnetized galaxy clusters, which are among the universe's largest gravitationally bound structures. The research will also facilitate predictive models for the Square Kilometre Array and the Lynx X-ray observatory.

Wynn Jacobson-Galán

Host Institution: California Institute of Technology

Proposal Title: Final Moments: Uncovering the Rate of Enhanced Red Supergiant Mass-loss in the Local Volume

Wynn Jacobson-Galán grew up in Los Angeles where he attended Santa Monica Community College before completing a bachelor’s degree in physics at UC Santa Cruz in 2018. Wynn was an IDEAS Fellow at Northwestern University where he earned a master’s degree in 2021. Wynn is currently an NSF Graduate Research Fellow at UC Berkeley under the supervision of Professor Raffaella Margutti and will finish his doctorate in summer 2024.

Wynn’s research focuses on combining multi-wavelength observations (radio to X-ray) of a variety of supernova types to create a complete picture of the final stages of stellar instability and mass-loss before explosion. His primary interest is the utilization of ultra-rapid observations of young supernovae in order to bridge the gap between stellar life and death. As a Hubble Fellow, Wynn will probe the late-stage evolution of red supergiant stars through observations and modeling of type II supernovae. Using transient sky surveys, he will construct the first volume-limited, spectroscopically-complete sample of type II supernovae discovered within days of explosion in order to constrain the final evolutionary stages of red supergiant stars in the local universe. Additionally, Wynn will utilize ultraviolet spectroscopy/imaging of both young and old core-collapse supernovae to constrain the physics of circumstellar shockwaves and the mass-loss histories of red supergiants in the decades-to-centuries before explosion.

Rafael Luque

Host Institution: The University of Chicago

Proposal Title: Understanding the Origin and Nature of Sub-Neptunes

Born in Priego de Córdoba (Spain), Rafael Luque earned his bachelor’s in physics from the University of Granada (Spain) in 2015 and his master’s in physics in 2017 from the University of Heidelberg (Germany). He earned his doctorate in 2021 thanks to a Doctoral INPhINIT Fellowship from the European Union and “la Caixa” Banking Foundation, having worked with Professor Enric Palle and Dr. Grzegorz Nowak at the Instituto de Astrofisica de Canarias (Spain). Currently, Rafael is a "Margarita Salas" Fellow at the University of Chicago, working with Professor Jacob Bean.

Rafael's research aims to understand the origin and nature of sub-Neptunes. This class of planets has no counterpart in the solar system, but they exist in (approximately) every other star in the Galaxy. Several theories and models can explain their existence and demographic properties, but they make opposing predictions about their internal structure, location at birth, evolution history, or atmospheric composition. As a Sagan Fellow, Rafael will exploit the synergies between ground- and space-based observatories to build a sample of sub-Neptunes with precise and accurate measured properties (such as radius, mass, and atmospheric composition) that break the modeling degeneracies inherent to this class and help us infer a unique answer about their properties.

Madeleine McKenzie

Host Institution: Carnegie Observatories

Proposal Title: Uncovering the Unknown Origins of Globular Clusters

Madeleine McKenzie is an Aussie from Perth, Western Australia. She earned her bachelor’s degree in physics and computer science from the University of Western Australia (UWA) in 2018. In 2020, she earned her master’s in astrophysics at UWA and the International Centre for Radio Astronomy Research (ICRAR) working on hydrodynamical simulations of globular cluster formation. For her doctorate, she transitioned from theory to observations to work with Dr. David Yong on the chemical abundance analysis of globular clusters at the Australian National University and is set to graduate at the end of 2024.

Following her passion for these ancient collections of stars, Madeleine has set the lofty goal of redefining what is and is not a globular cluster. With next-generation telescopes such as the James Webb Space Telescope discovering dense stellar structures in the early universe, understanding the different formation channels of the star clusters and dwarf galaxies in our backyard is becoming more important. As a Hubble Fellow, she will utilize kinematic and chemical element abundance variations, particularly that of iron peak and neutron capture process elements, to characterize the diversity of star clusters around our Milky Way. Using the Magellan Telescopes operated by the Carnegie Observatories, she will undertake an ambitious observing program to identify which balls of stars are masquerading as globular clusters using a combination of high-precision chemical abundances and isotopic analysis. The outcomes from her project will help improve our understanding of fields such as star formation, nucleosynthesis, stellar evolution, and the accreted halo of our Milky Way.

Jed McKinney

Proposal Title: The Role of Dust in Shaping the Evolution of Galaxies

Jed McKinney grew up between Old Greenwich, CT and Brussels, BE. He achieved his bachelor’s degree at Tufts University in 2017, and his doctorate in astronomy from The University of Massachusetts, Amherst in 2022. During his studies Jed was an IPAC Visiting Graduate Fellow at Caltech. He is currently a Postdoctoral Fellow at The University of Texas at Austin.

Jed’s research focuses on understanding the lifecycle of galaxies through the lens of dust. Dust, a by-product of star formation like interstellar pollution, is a small component of galaxies by mass but plays a transformative role in how we observe, interpret, and model them. Jed’s research uses both observations and simulations to directly test and contextualize the nuanced role of dust in galaxy formation.

As a Hubble Fellow at The University of Texas at Austin, Jed will combine detailed spectroscopic surveys using James Webb Space Telescope and ALMA with large multi-wavelength imaging programs and simulations. Jed will measure directly the properties of dust grains in distant galaxies to uncover the relationship between dust, star- and supermassive black-hole formation out to early times in the history of the universe. This will enable a new and unbiased perspective on the mechanics of galaxy formation, one that is rooted in a comprehensive census of dust.

Keefe Mitman

Host Institution: Cornell University

Proposal Title: Decoding General Relativity with Next-Generation Numerical Relativity Waveforms

Keefe Mitman was raised in Madison, Wisconsin. He earned his bachelor’s degree in mathematics and physics from Columbia University in 2019 and his doctorate in physics from the California Institute of Technology in 2024. At Caltech, he studied black holes, gravitational waves, and numerical relativity with Professor Saul Teukolsky and the Simulating eXtreme Spacetimes (SXS) Collaboration.

Keefe’s research largely focuses on utilizing results from the gravitational wave theory community to improve contemporary numerical relativity simulations of binary black hole coalescences. One such example of this was using these simulations to calculate and model an intriguing and not-yet observed prediction of Einstein’s theory of general relativity called the gravitational wave memory effect. This effect corresponds to the permanent net displacement that two observers will experience due to the passage of transient gravitational radiation and is of immense interest to those working on testing general relativity, probing the fundamental structure of spacetime, and understanding the enigmas of quantum gravity.

As an Einstein Fellow at Cornell University, Keefe will continue his work with the SXS Collaboration to build models of the gravitational waves that can be observed by current gravitational wave detectors. In particular, he will focus on constructing waveform models that contain the memory effect to help observe this perplexing phenomenon, as well as others, for the first time.

Sarah Moran

Host Institution: NASA Goddard Space Flight Center

Proposal Title: From Stars to Storms: Planetary Cloud Seeding with Sulfur-Based Hazes

Sarah Moran grew up in Kansas City, Missouri. She earned her bachelor’s degree with a major in Astrophysics and a minor in Science and Public Policy at Barnard College of Columbia University in New York in 2015. She earned her doctorate in planetary sciences from Johns Hopkins University in 2021, having worked under Sarah Hörst and Nikole Lewis. During her graduate studies, she also served as a Space Policy Fellow with the Space Studies Board at the National Academies of Sciences, Engineering, and Medicine.

Sarah is currently the Director’s Postdoctoral Fellow at the University of Arizona’s Lunar and Planetary Laboratory with Mark Marley.

Sarah’s research combines laboratory astrophysics and atmospheric modeling to understand the aerosols that form in substellar atmospheres, from solar system worlds to exoplanets to brown dwarfs. Aerosols act as tracers of the physics and chemistry of these atmospheres, giving insight into the processes that shape the observable spectra of these objects. As a Sagan Fellow, Sarah will experimentally investigate the effect of sulfur species in forming atmospheric hazes and examine whether such particles enhance or inhibit exotic exoplanet cloud formation. These studies will help interpret ongoing and future observations from the Hubble Space Telescope, James Webb Space Telescope, and next-generation observatories.

Andrew Saydjari

Proposal Title: Inferring Kinematic and Chemical Maps of Galactic Dust

Andrew Saydjari grew up in Wisconsin Rapids, WI. He earned his bachelor’s degree in mathematics and bachelor’s and master’s in chemistry at Yale University in 2018, with a thesis on organometallic catalysis. Andrew then moved to Harvard University as an NSF Graduate Research Fellow and will complete his doctorate in physics spring 2024, advised by Douglas Finkbeiner.

Andrew’s work focuses on combining astrophysics, statistics, and high-performance coding to study the chemical, spatial, and kinematic variations in the dust that permeates the Milky Way. Dust is an important building block in matter assembly, and a driver of the interstellar environment and galactic foreground. As a Hubble Fellow at Princeton, Andrew will use new, unbiased measurements of near infrared diffuse interstellar bands to precisely map the kinematics and chemistry of galactic dust. He strives to constrain feedback processes shaping the interstellar medium and improve compositional constraints on dust. He will develop the rigorous statistical machinery necessary to combine spectroscopic surveys with upcoming photometry from SPHEREx and the Nancy Grace Roman Space Telescope to answer his motivating questions: “What is dust made of, where is it, and how is it moving?”

Peter Senchyna

Proposal Title: Bridging the Gap: Bringing the First Galaxies into Focus with Local Laboratories

Peter Senchyna grew up in rural Venersborg / Battle Ground, Washington, and earned a bachelor’s degree at the University of Washington. He earned his doctorate working with Dan Stark at the University of Arizona in 2020. Since then, Peter has held a Carnegie Fellowship at the Observatories of the Carnegie Institution for Science in Pasadena.

Peter's research is focused on understanding the first generations of massive stars and the galaxies for which they laid the foundations. Our understanding of how the universe was reionized and the earliest phases of galaxy assembly are inextricably bound-up with uncertainties in the physics of metal-poor massive stars, including the potentially profound but uncertain role of binary mass transfer. As a Hubble Fellow, Peter will bring new James Webb Space Telescope observations into conversation with several unique datasets in the local universe. These include extraordinarily deep ultraviolet continuum spectroscopy of nearby extremely metal-poor blue compact dwarf galaxies with the Hubble Space Telescope, and a large Magellan narrowband imaging campaign dissecting dwarf irregulars at the edge of the Local Group. Peter aims to unite these observations spanning from our cosmic backyard to redshift ~10 to cast light on both the nature of galaxies at cosmic dawn and massive star evolution under (near-)primordial conditions.

Raphael Skalidis

Proposal Title: Magnetic Fields in the Multiphase Interstellar Medium

Raphael Skalidis grew up in Rethymno, Crete, Greece. He obtained his doctorate from the Department of physics at the University of Crete in 2022, and later moved to the California Institute of Technology as a postdoctoral fellow. His research focuses on the interstellar medium (ISM).

Observatories such as LOFAR and the Planck satellite have revealed that a coherent magnetic field permeates the different phases of the ISM, challenging some common conceptions. As a Hubble Fellow, Raphael aims to develop theories about the role of magnetic fields in shaping the multiphase ISM. He will follow a multifaceted approach that will include comparisons between synthetic data and observations, analytical calculations, and numerical simulations. Raphael’s research promises to advance our knowledge of the magnetized ISM which is critical for understanding galaxy evolution and star formation.

Adam Smercina

Host Institution: Space Telescope Science Institute

Proposal Title: A Portrait of the Triangulum: Advancing a New Frontier of Galaxy Evolution with Resolved Stars

Adam Smercina is a native of Northwest Ohio, growing up in the small town of Oak Harbor near the shore of Lake Erie. He earned a bachelor’s degree in physics, with a concentration in astrophysics, from the University of Toledo in 2015. He then moved north to the University of Michigan in Ann Arbor, where he ultimately earned his doctorate in astronomy and astrophysics in August 2020, advised by Eric Bell. Adam was supported during his doctorate work by a Graduate Research Fellowship from the National Science Foundation. Since 2020, he has worked with Julianne Dalcanton and Ben Williams at the University of Washington as a postdoctoral scholar.

Adam's research focuses on reconstructing the evolutionary histories of galaxies by resolving them into their constituent stars. We are in an exciting new era where the Hubble Space Telescope and James Webb Space Telescope operate simultaneously, providing better access to the resolved stellar populations in individual nearby galaxies than ever before. These galaxies' constituent stars are tremendously information-rich, providing an archaeological record of their host galaxy's evolution. As a Hubble Fellow at STScI, Adam will use these stars to chart the evolution of structure, star formation, and interaction in galaxies throughout the Local Volume, including a targeted study of the Triangulum Galaxy, M33. The first large galaxy with panchromatic Hubble+Webb observations across its disk, M33 is among the most important members of the Local Group, and exists at a mass where the physics driving the evolution of spiral galaxies is poorly understood. This work will establish a foundational blueprint for a new era of studying resolved stellar populations in large galaxies from space, setting the benchmark for future facilities studying more distant, cosmologically-representative populations of galaxies.

Shangjia Zhang

Proposal Title: Probing Young Planet Populations with 3D Self-Consistent Disk Thermodynamics

Shangjia Zhang was born and raised in Beijing, China. He earned bachelor’s degrees in astronomy and physics from the University of Michigan, Ann Arbor in 2018. He is currently completing his doctorate at the University of Nevada, Las Vegas, under the guidance of Professor Zhaohuan Zhu.

Shangjia's research interests focus on several aspects of protoplanetary disks, including constraining dust properties and disk thermal structure, and inferring potential young planet populations from disk substructures. As a Sagan Fellow, he will use state-of-the-art radiation hydrodynamic simulations to self-consistently study disk thermodynamics. By deepening our understanding of disk physics, his goal is to provide better explanations for disk images and kinematics obtained from radio interferometers and giant telescopes. By bridging theory with observations, he aims to distinguish substructures’ planetary and non-planetary origins and uncover more young planets.

Host Institution: University of Chicago

Proposal Title: Enabling Radial Velocity Detection of Earth-Twins Through Data-Driven Algorithms and Community Collaboration

Lily Zhao grew up in west Philadelphia. She earned bachelors’ degrees in biology, mathematics, and physics from the University of Chicago in 2016. Lily was a National Science Foundation Graduate Research Fellow at Yale University, where she earned her doctorate in astronomy in 2021 under the supervision of Professor Debra Fischer. Since 2021, Lily has been a Flatiron Research Fellow at the Center for Computational Astrophysics.

Lily's research advances precision spectroscopy with a focus on dynamical discovery and characterization of lower-mass exoplanets. She is the project scientist for EXPRES, an ultra-stabilized optical spectrograph. Lily also leads the Extreme Stellar Signals Project, a community-wide collaboration with over 40 members working together to mitigate stellar signals, which are now the largest source of scatter in precision radial velocity measurements. As a Sagan Fellow at the University of Chicago, Lily will develop empirical methods for mitigating stellar signals using the full spectral format and continue coordinating community efforts.

Sebastian Zieba

Proposal Title: Characterization of Rocky Exoplanet Surfaces and Atmospheres in the JWST Era

Sebastian Zieba grew up in Salzburg, Austria. He earned his bachelor’s degree in physics from the University of Innsbruck in 2017. He remained in Innsbruck to pursue his master’s degree, during which he discovered transiting comets orbiting the exoplanet host star Beta Pictoris. After completing his master’s in 2020, he moved to Heidelberg, Germany to pursue a doctorate in astronomy under the supervision of Professor Laura Kreidberg, which he will complete in the summer of 2024.

During Sebastian’s doctorate research at the Max Planck Institute for Astronomy, he has pushed the boundary of atmospheric characterization down to small, rocky exoplanets. He has used space-based telescopes like the Spitzer Space Telescope, Hubble Space Telescope, and James Webb Space Telescope to cover an extensive temperature range, from lava worlds with outgassed rock vapor atmospheres caused by scorching temperatures exceeding 2000 Kelvin to terrestrial planets with temperatures around 400 K, more comparable to our own inner solar system.

As the Principal Investigator (PI) of two accepted Cycle 2 Webb proposals, Sebastian will characterize the surfaces of hot, airless planets, measure their surface roughness, and explore the transition region between rocky and gaseous planets. As a Sagan Fellow, he will analyze these upcoming observations to unravel the geological history of rocky exoplanets and determine the conditions under which these small worlds retain atmospheres.

Contact the NHFP

[email protected] NASA Hubble Fellowship Program