intergalactic medium Professors and Supervisors | ApplySharif

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Thomas H. ReiprichView profile

Professor

Rhenish Friedrich Wilhelm University of BonnGermany

Professor Thomas H. Reiprich is a leading astrophysicist at the Argelander Institute for Astronomy, University of Bonn, specializing in X-ray observations of galaxy clusters and large-scale cosmic structure. His research focuses on dark energy, cosmology, and the physics of intergalactic medium through missions like eROSITA. His primary research interests include: Clusters of Galaxies and their evolution Supermassive Black Holes and active galactic nuclei Cosmological structure formation Gravitational lensing phenomena X-Ray and Optical Astronomy techniques Professor Reiprich's recent work has centered on the eROSITA mission, with groundbreaking discoveries including the 15 Mpc intergalactic filament connecting galaxy clusters Abell 3391/95, providing unprecedented evidence of cosmic web structure. His research combines X-ray, radio, and optical data to study the hot gas in cluster outskirts and filaments. He has been actively involved in public outreach, including lectures at the Planetarium Hamburg and Astronomy on Tap events, making complex cosmological concepts accessible to the general public. His work has received significant media attention from international science outlets including NASA and ESA. Professor Reiprich maintains an active teaching schedule at the University of Bonn, regularly offering courses on dark energy, galaxy clusters, and X-ray astronomy, for which he and colleague Jürgen Schmitt received the faculty's teaching award for their dark energy lecture in WS15-16.

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Joop SchayeView profile

Professor

Leiden UniversityNetherlands

Joop Schaye is a Full Professor at Leiden University, affiliated with the Leiden Observatory within the Faculty of Science. His research focuses on galaxy formation, the intergalactic medium (IGM), and cosmological hydrodynamical simulations. He leads the FLAMINGO and COLIBRE projects, building on prior work with OWLS and EAGLE simulations. Role: Professor of Galaxy Formation and IGM Research Affiliation: Leiden Observatory, Faculty of Science Research & Group His group includes current PhD candidates (e.g., Jeger Broxterman, William McDonald) and postdocs (e.g., Victor Forouhar Moreno). Former students include Roi Kugel and Jorryt Matthee. Active collaborations involve MUSE surveys and Athena X-ray instrumentation. Awards Appointed member of the Royal Netherlands Academy of Arts and Sciences (KNAW) in 2025, recognizing his contributions to astrophysics. Teaching Teaches the Spring 2025 MSc course Large-scale structure and galaxy formation .

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Stephen WarrenView profile

Professor

Imperial College LondonUnited Kingdom

Stephen Warren is a Professor of Astrophysics at Imperial College London's Department of Physics, part of the Faculty of Natural Sciences. He has been at Imperial since 1994, previously holding postdoctoral fellowships at institutions like Steward Observatory and ESO. His research focuses on observational astronomy, including surveys for high-redshift quasars, brown dwarfs, gravitational lensing, and quasar absorption lines. He led the UKIRT Infrared Deep Sky Survey as Survey Scientist until 2012 and served as Head of Astrophysics at Imperial from 2010 to 2015. Education: BA and PhD (1988) from the University of Cambridge. His academic positions include Consul for the Faculty of Natural Sciences & Education Office at Imperial College London since 2020. Research interests emphasize discovering celestial objects through surveys and understanding their properties. His work spans quasar environments, galaxy mass modeling, and brown dwarf characterization. Recent publications highlight advancements in gravitational lensing models, Milky Way vertical structure analysis, and Euclid mission predictions for high-redshift quasars. Affiliations include the Astrophysics Group, Physics of the Universe, and Space Lab at Imperial. His contributions to large surveys and observational techniques have been foundational in extragalactic astronomy and sub-stellar object classification.

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Stella OckerView profile

Research Fellow

California Institute of Technology (Caltech)United States

Stella Ocker is a Brinson Prize Postdoctoral Fellow at the California Institute of Technology (Caltech) and the Carnegie Observatories, affiliated with the Division of Physics, Mathematics, and Astronomy in the Astronomy Department. Her research focuses on using pulsars, fast radio bursts (FRBs), and multi-wavelength observations to study the interstellar and intergalactic medium. She is part of the NANOGrav Collaboration, the DSA-110 science team, and the pulsar working groups for DSA-2000 and the Square Kilometer Array (SKA). Her work addresses the distribution and dynamics of ionized gas in the Galaxy and beyond, with a particular emphasis on radio surveys like DSA-2000 and CHORD. Key research areas include probing circumgalactic turbulence via FRBs and pulsars, analyzing scattering variability in FRB environments, and studying plasma structures around neutron stars. She has contributed to projects like the NE2001p electron density model implementation and investigations of non-radiative shocks in stellar bow shocks. Ocker has also explored the heliosphere-interstellar medium interaction, leveraging Voyager 1 data to study plasma waves in interstellar space. Her awards include the Brinson Prize Postdoctoral Fellowship. Ocker collaborates extensively with international teams and contributes to major initiatives like NANOGrav’s gravitational wave detection efforts and the DSA-2000 survey. Her research bridges observational astronomy with theoretical modeling, addressing fundamental questions about cosmic plasma dynamics and the structure of the Galactic and extragalactic medium.

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Garrelt MellemaView profile

Professor

Stockholm UniversitySweden

Garrelt Mellema is a Professor in the Department of Astronomy at Stockholm University, specializing in computational astrophysics and cosmology. His research focuses on the Epoch of Reionization, the period when the first stars and galaxies formed approximately 13 billion years ago. He leads work in developing computational tools for astrophysical research across various domains from solar physics to cosmology. Professor Mellema's primary research interest centers on the Epoch of Reionization and Cosmic Dawn, particularly studying the 21-cm signal from neutral hydrogen. His work employs advanced computational methods including radiative transfer simulations (C2-Ray, pyC2Ray), machine learning techniques, and analysis of observational data from radio telescopes like LOFAR and the future SKA. His research group develops computational tools for studying cosmic reionization, the formation of the first structures, and the evolution of the intergalactic medium. The analysis of his recent publications reveals a strong focus on extracting the faint 21-cm signal from observational data using innovative techniques including neural networks and advanced statistical methods. His work bridges theoretical modeling with observational constraints, particularly from LOFAR observations, to understand the physical conditions during the cosmic dawn and epoch of reionization. Current research trends show increasing integration of machine learning with traditional astrophysical methods to overcome systematic challenges in 21-cm cosmology. As leader of the Computational Astrophysics Group at Stockholm University, Professor Mellema oversees development of simulation tools used by the international community studying cosmic reionization. His work on the C2-Ray radiative transfer code has become a standard tool in the field, with GPU-accelerated versions enabling more detailed simulations of the complex processes during the formation of the first luminous objects in the universe.

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Dominik J. BomansView profile

Professor

Ruhr University BochumGermany

Prof. Dr. Dominik J. Bomans is a Professor at the Astronomical Institute of Ruhr University Bochum in Germany, located at GAFO 03 / 973, Universitätsstr. 150, 44801 Bochum. His research interests are broad and deep, spanning: Formation and evolution of dwarf galaxies Low surface brightness galaxies Diffuse warm and hot interstellar medium Galactic outflows, winds, and the circumgalactic medium Starburst galaxies at intermediate and high redshift Magnetic fields in galaxies, their circumgalactic medium, and the intergalactic medium Interstellar absorption lines of the warm and hot interstellar, circumgalactic, and intergalactic medium Interaction of massive stars with the interstellar medium Massive stellar transients His work bridges the gap between observational astronomy and theoretical astrophysics, with a focus on understanding the lifecycle of galaxies, the physics of their gaseous environments, and the role of magnetic fields and stellar feedback in galactic evolution. No students, awards, or publications are listed on his current webpage. He can be contacted via email at bomans@astro.ruhr-uni-bochum.de .

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Caryl GronwallView profile

Research Professor

Pennsylvania State UniversityUnited States

Caryl Gronwall is a Research Professor in the Department of Astronomy and Astrophysics at Pennsylvania State University. Her research focuses on high-energy astrophysical phenomena, galaxy evolution, and large-scale structure formation at cosmic noon. She utilizes multiwavelength observations from facilities like the Swift satellite, HETDEX, and the ODIN survey to study gamma-ray bursts (GRBs), Lyman Alpha Emitters (LAEs), and protoclusters. Key projects include analyzing GRB afterglows for transient characterization, investigating the intergalactic medium via Lyman Alpha absorption, and mapping galaxy clustering in high-redshift environments. Her work with LIGO/Virgo collaborations explores gravitational wave events through Swift/XRT follow-up observations. Research interests span cosmological structure formation, UV background measurements, and the evolution of star-forming galaxies. She contributes to surveys like UVCANDELS and the HETDEX Public Source Catalog, advancing understanding of galaxy populations and quenching mechanisms in protoclusters. Her recent studies highlight strong clustering of LAEs in ODIN fields, metallicity variations in Seyfert galaxies, and dust attenuation effects in nearby star-forming regions. Collaborative efforts with international teams address questions about cosmic reionization and the IRX-β relation in galactic regions.

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Jeffrey B. PetersonView profile

Professor

Carnegie Mellon UniversityQatar

Jeffrey B. Peterson is a Professor of Physics at Carnegie Mellon University's Department of Physics within the Mellon College of Science. His expertise lies in astrophysics and cosmology, focusing on designing novel radio telescopes to study dark energy, fast radio bursts, and the early universe. He holds a Ph.D. from UC Berkeley and has been affiliated with CMU since 1993, serving as Professor since 2003. His research involves collaborations at globally significant sites like Isla Guadalupe, Marion Island, Xinjiang, and the South Pole, where instruments like ACBAR contributed to measuring the universe's total mass. Education: Ph.D., UC Berkeley Research interests include constructing telescopes with cylindrical reflectors and satellite arrays to explore cosmic phenomena. Recent publications emphasize radio instrument design, pulsar timing, and FRB detection. His team's work spans observational cosmology, instrument engineering, and early-universe studies. Peterson leads a dedicated group advancing radio astronomy techniques for probing fundamental cosmic mysteries.

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Evan ScannapiecoView profile

Professor

Arizona State UniversityUnited States

Evan Scannapieco is a Professor of Astrophysics at Arizona State University's School of Earth and Space Exploration (SESE). His research focuses on understanding feedback processes in galaxy formation and the evolution of elements across cosmic time. He holds academic appointments since 2007, progressing from Assistant to Professor. Scannapieco earned his Ph.D. in Physics from UC Berkeley (2001) and an A.B. in Physics from Harvard (1996). Education: Harvard University (A.B. 1996), UC Berkeley (MS 1999, Ph.D. 2001) Appointments: NSF Postdoc (2001-03), SESE Assistant Professor (2007-13), Associate Professor (2013-18), Full Professor (2018-present) His research emphasizes AGN feedback, first stars, galaxy outflows, and turbulence. Key projects include modeling galactic winds, studying circumgalactic medium turbulence, and analyzing supernova-driven processes. Scannapieco has led over $5M in federal grants from NASA and NSF, focusing on simulations of galaxy formation and cosmic enrichment. He advises a diverse team of students and postdocs, including current PhD candidates Edward Buie and J’Neil Cottle. Notable past advisees include Richard Sarmento (now at US Naval Academy) and Alexander Spacek (Los Alamos). Scannapieco has organized workshops like the Turbulent Life of Cosmic Baryons (2019) and contributed to projects like the LOFAR radio telescope initiative. Awards: Dr. Manuel Servín Faculty Award (2019), NASA HQ Honor Award (2019), Ontario Research & Innovation Optical Network Discovery Award (2007), and the NSF Distinguished Postdoctoral Fellowship (2001). Scannapieco serves on NASA committees including the Astrophysics Theory Program and chairs the DEI Task Force for the Astrophysics Division. He also chairs the NASA Artificial Intelligence/Machine Learning Task Force and leads HPC allocation efforts for astrophysics.

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William E. HarrisView profile

Professor

McMaster UniversityCanada

William E. Harris is a Professor in the Department of Physics and Astronomy at McMaster University. He holds the title of Fellow of the Royal Society of Canada (FRSC) and has held a Killam Research Fellowship. His research focuses on giant elliptical galaxies, stellar populations, and globular clusters, utilizing data from major observatories including the Hubble and James Webb Space Telescopes. Education: B.Sc. (Mathematics, University of Alberta), Ph.D. (Astronomy, University of Toronto). Postdoctoral fellowship at Yale University. Academic leaves at Royal Observatory (Edinburgh), Herzberg Institute of Astrophysics (Victoria), Kitt Peak National Observatory (Arizona), and ANU (Australia). Professional Contributions: President of Canadian Astronomical Society (CASCA), Board Chair of Canada-France-Hawaii Telescope (CFHT), NSERC grant panel member, and Hubble Space Telescope time allocation committee. Co-authored the 2010 Long Range Plan for Canadian Astronomy. Awards: Beals Award (2010), Royal Society of Canada Fellowship (2004), Killam Fellowship (2008-2009). Research Themes: Globular cluster systems, galaxy formation, stellar population analysis, and observational techniques using advanced telescopes. Active in international collaborations and large-scale survey projects.

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Rongmon BordoloiView profile

Assistant Professor

North Carolina State UniversityUnited States

Rongmon Bordoloi is an Assistant Professor of Physics at North Carolina State University's College of Sciences, specializing in galactic and extragalactic astrophysics. His research focuses on the origins and evolution of galaxies, particularly leveraging the James Webb Space Telescope (JWST) for post-launch observational programs. He investigates circumgalactic and intergalactic medium dynamics, galaxy outflows, and cosmic reionization processes. Key research areas include: (1) gas flows around galaxies, (2) ultraviolet properties of multiphase gas, (3) circumgalactic medium (CGM) structure in systems like Andromeda, and (4) high-redshift galaxy-quasar interactions. Recent work explores the interplay between galactic evolution and cosmic-scale phenomena using state-of-the-art observational techniques. His recent publications (2024–2025) highlight studies on galactic outflows, reionization epoch dynamics, and quasar-galaxy correlations. Despite his prolific research output, no formal awards, grants, or advising records are explicitly mentioned in the provided texts. No lab affiliations or team collaborations are detailed in the available data.

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Nikhil PadmanabhanView profile

Associate Professor

Yale UniversityUnited States

Nikhil Padmanabhan is an Associate Professor of Physics at Yale University. His research focuses on theoretical and observational cosmology, particularly in the areas of baryon acoustic oscillations (BAO), dark energy probes, and galaxy clustering analysis. He is a key contributor to the Dark Energy Spectroscopic Instrument (DESI) project, which aims to map the universe’s large-scale structure to constrain cosmological parameters. Padmanabhan holds a Ph.D. from Princeton University (2006). His work integrates advanced statistical methods, machine learning, and high-performance computing to analyze galaxy surveys. Research interests include ultra-light dark matter dynamics, cosmic density field reconstruction, and systematic uncertainties in BAO measurements. He has contributed to instrumental design for future surveys like the MegaMapper and NANCY, targeting precision cosmology. Recent studies emphasize optimizing BAO analyses using neural networks, exploring Lyman-alpha forest signals, and probing primordial non-Gaussianity. His publications often address methodological improvements in covariance matrix estimation, redshift weighting, and mock catalog generation for large galaxy surveys. Education : Ph.D. in Physics, Princeton University, 2006 Key Projects : DESI, MegaMapper, NANCY, SDSS-IV Labs/Teams : Part of Yale’s Theoretical Astrophysics group and DESI Collaboration No scientific awards explicitly listed in the provided materials. Advising and grants remain unspecified in the scraped text.

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Megan E DonahueView profile

Professor

Michigan State UniversityUnited States

Megan E Donahue is a University Distinguished Professor in the Department of Physics & Astronomy at Michigan State University. Her research focuses on galaxy clusters, intergalactic gas physics, and cosmology, with a particular emphasis on AGN feedback mechanisms and star formation regulation. Education: Ph.D., University of Colorado (1990) Her work explores how supermassive black holes influence their host galaxies' circumgalactic medium, the properties of galaxy clusters as cosmological probes, and the thermodynamics of intergalactic gas. She employs multiwavelength observations (infrared to X-ray) to study these phenomena. Recent publications highlight advancements in understanding galaxy cluster evolution via projects like CHEX-MATE and SPT-Chandra surveys, with key contributions to AGN feedback models, intracluster light dynamics, and high-redshift galaxy studies using JWST and HST. Scientific Awards: Fellow of the American Physical Society (2016) President of the American Astronomical Society (2017) Professor Donahue is also deeply involved in public service, education reform in astronomy, and outreach activities including textbook authorship and public talks.

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Peter QuinnView profile

Professor

The University of Western AustraliaAustralia

Professor Peter Quinn is a distinguished astrophysicist at the University of Western Australia , serving as Chairman of the Board at the International Space Centre and affiliated with the International Centre for Radio Astronomy Research (ICRAR) and the Office of DVC Research . He received his BSc(Hons) in Mathematics and Physics from the University of Wollongong in 1978 with the University Medal in Physics, and his PhD in astronomy and astrophysics from the Australian National University (ANU) in 1982. His research centers on galaxy formation and evolution , dark matter dynamics , and the Epoch of Reionization . He has pioneered computational astrophysics, particularly through the discovery of the Quinn-Goodman effect and contributions to the MACHO Dark Matter Search Project . He has led major initiatives in the European Southern Observatory (ESO) , including the Very Large Telescope (VLT) data flow system and the Astrophysical Virtual Observatory (AVO) project. His scholarly work spans radio astronomy , supercomputer simulations , and data-intensive science , with a strong focus on the Square Kilometre Array (SKA) and gravitational wave detection . His work has earned him several prestigious accolades including a NASA High Performance Computing Award and a Computerworld 21st Century Achievement Award . He is a Fellow of the Australian Academy of Science (FASA) and a Fellow of the Australian Institute of Physics (FTSE) . His research also extends to large-scale international infrastructure projects and planning for the Square Kilometre Array and gravitational wave observations . He has served as Division Head at ESO and as a Chief Investigator for numerous grants, including the Australian SKA Regional Centre and ICRAR core funding .

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Keith VanderlindeView profile

Associate Professor

University of TorontoCanada

Keith Vanderlinde is an Associate Professor at the David A. Dunlap Department of Astronomy & Astrophysics and the Dunlap Institute at the University of Toronto. His research focuses on cosmology and long-wavelength instrumentation, particularly large-scale structure studies and the expansion history of the universe. He leads projects like CHIME/FRB, CHORD, and HIRAX, developing radio telescopes to detect fast radio bursts (FRBs) and map cosmic evolution. Education: PhD in Physics (University of Chicago, 2008); BS in Physics with EE (MIT, 2002). Awards include CIfAR Junior Fellow (2011-2012) and McGill Trottier Fellow (2009-2011). Research interests span cosmological instrumentation, dark energy probes, and transient astronomy. Key projects include the CHIME radio telescope (studying 21cm emission and FRBs), the CHORD observatory, and international collaborations like HIRAX in South Africa. His work emphasizes instrument design, data analysis pipelines like kotekan, and multi-messenger astronomy. Lab involvement includes the Algonquin Radio Observatory and contributions to SPT-3G. Active in graduate/undergraduate training, mentoring students in cosmology and radio instrumentation.

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