
AXIS Team
The AXIS team is a large community of over 600 scientists and engineers from across the U.S. and around the world, united by a shared mission to advance X-ray astronomy. We value a broad range of expertise and experience, with early-career researchers taking on leadership roles alongside senior members. We are committed to fostering a respectful and collaborative environment, as outlined in our Code of Conduct.

Christopher Reynolds
Principal Investigator
Chris Reynolds is a professor of astronomy at the University of Maryland. He is a leading expert in black hole astrophysics, bridging theory and X-ray observations to investigate the physics of accretion flows, black hole spin, and the broader influence of supermassive black holes on their host galaxies. His work has significantly advanced our understanding of active galactic nuclei and high-energy astrophysical processes.

Erin Kara
Deputy Principal Investigator
Erin Kara is an assistant professor of physics at MIT. She studies accreting black holes using X-ray reverberation mapping techniques, aiming to understand fundamental processes near black holes and the role of relativistic effects.

Andrew Ptak
Project Scientist
Andrew (Andy) Ptak is a senior astrophysicist at NASA’s Goddard Space Flight Center. His work spans X-ray astronomy of galaxies and AGN, contributing to mission concept development and data analysis methods for future high-energy observatories.
Science Team

Steven Allen
Co-Investigator
Steven Allen is a professor of physics at Stanford University. He specializes in X-ray and optical studies of galaxy clusters, utilizing them as cosmological probes to measure dark matter, dark energy, and cosmic structure formation.

Franz Bauer
Co-Investigator
Franz Bauer is an astronomer at the Pontificia Universidad Católica de Chile (and formerly associated with Space Science Institute). His work explores X-ray and radio observations of AGN and star-forming galaxies, examining the interplay between black hole growth and galaxy evolution.

Marshall Bautz
Co-Investigator
Marshall (Mark) Bautz is a senior research scientist at MIT’s Kavli Institute for Astrophysics and Space Research. He has contributed significantly to the design and calibration of CCDs for X-ray observatories, including the Chandra X-ray Observatory. Senior Technical Advisor to FPA team.

Arash Bodaghee
Co-Investigator
Arash Bodaghee is an assistant professor of astronomy at Georgia College & State University. His interests include high-energy astrophysics, particularly the observational study of X-ray binaries and massive stellar populations in our Galaxy.

Kevin Burdge
Co-Investigator
Kevin Burdge is an astrophysics researcher at MIT. He uses time-domain surveys and multimessenger observations to identify and characterize compact stellar objects, such as white dwarf binaries and black hole candidates. Co-Lead of the compact objects SWG.

Nico Cappelluti
Co-Investigator
Nico Cappelluti is an associate professor at the University of Miami. He explores the cosmic X-ray background, black hole accretion, and large-scale structure, using space missions to understand the universe’s evolution at high energies. Co-Lead of the AGN/SMBH Science Working Group

Brad Cenko
Co-Investigator
Stephen (Brad) Cenko is an astrophysicist at NASA’s Goddard Space Flight Center and the University of Maryland. He specializes in time-domain astronomy, particularly studying gamma-ray bursts and other transient cosmic explosions. Co-Lead, TDAMM WG

Kai-Wing Chan
Co-Investigator
Kai-Wing Chan is associated with NASA’s Goddard Space Flight Center and has worked on developing and testing advanced X-ray instrumentation. Their interests include improving X-ray telescope imaging and sensitivity for cosmic surveys. X-ray Mirror Scientist

George Chartas
Collaborator
George Chartas is a professor at the College of Charleston. He studies quasars and their winds via X-ray spectroscopy, investigating the outflows that regulate black hole growth and galaxy evolution.

Lia Corrales
Co-Investigator
Lia Corrales is an assistant professor of astronomy at the University of Michigan. She uses X-ray observations to study the dust and gas around black holes, neutron stars, and other extreme astrophysical environments. Co-Lead, Stars/Planets Working Group

Tansu Daylan
Collaborator
Tansu Daylan is a researcher at Washington University in St. Louis. He specializes in data analysis and software development for exoplanet detection, dark matter searches, and multiwavelength astrophysical modeling.

Abe Falcone
Co-Investigator
Abe Falcone is a research professor of astronomy and astrophysics at Penn State University. He develops X-ray and gamma-ray instrumentation and investigates transient astrophysical phenomena, such as gamma-ray bursts and flaring AGN. Digital Electronics Lead Scientist

Adi Foord
Co-Investigator
Adi Foord is an assistant professor of physics at the University of Maryland, Baltimore County (UMBC). Her work focuses on detecting dual supermassive black holes and studying the dynamical and emission properties of merging galaxies. Co-Lead of the AGN/SMBH Science Working Group

Catherine Grant
Co-Investigator
Catherine Grant is a researcher at MIT’s Kavli Institute for Astrophysics and Space Research. She works on X-ray instrumentation and data analysis pipelines, contributing to the study of diffuse emission in galaxy clusters and other large-scale structures. AXIS FPA Calibration Scientist

Melanie Habouzit
Collaborator
Melanie Habouzit is an assistant professor of astronomy at the University of Geneva. Her theoretical and numerical work investigates the formation and growth of black holes in galaxies, linking high-resolution simulations to observational constraints.

Daryl Haggard
Co-Investigator
Daryl Haggard is an assistant professor of physics at McGill University in Canada. Her research spans multiwavelength and multimessenger observations of black hole activity, with a focus on galactic center black holes and neutron star mergers. Co-Lead, TDAMM Working Group

Sven Herrmann
Co-Investigator
Sven Herrmann is a researcher at Stanford University. He specializes in computational astrophysics and high-energy phenomena, particularly modeling jets and outflows in active galactic nuclei. Detector Electronics/ASIC Lead Scientist

Edmund Hodges-Kluck
Co-Investigator
Edmund Hodges-Kluck is an astrophysicist at NASA’s Goddard Space Flight Center. His research investigates galaxy halos, interstellar media, and feedback mechanisms that regulate star formation and black hole activity.

Oleg Kargaltsev
Collaborator
Oleg Kargaltsev is a professor of physics at George Washington University. He focuses on X-ray observations of neutron stars, pulsar wind nebulae, and other compact objects, analyzing their emission and outflows.

George King
Collaborator
George King is a researcher at the University of Michigan. His interests include high-energy astrophysical processes in black hole accretion disks and disk-jet couplings, explored through multiwavelength campaigns and theoretical modeling.

Mike Koss
Co-Investigator
Michael Koss is a senior research scientist at Eureka Scientific. He focuses on observations of AGN, studying the coevolution of supermassive black holes and their host galaxies, especially in the context of galaxy mergers.

Marina Kounkel
Co-Investigator
Marina Kounkel is an assistant professor of physics and astronomy at the University of North Florida. She uses large surveys and astrometric data to study the formation, dynamics, and clustering of stars in our Galaxy.

Laura Lopez
Co-Investigator
Laura Lopez is an associate professor of astronomy at The Ohio State University. She investigates the life cycle of stars, supernova remnants, and the interstellar medium, employing multiwavelength data to understand stellar feedback and elemental enrichment.

Stefano Marchesi
Co-Investigator
Stefano Marchesi is an astrophysicist at Clemson University. He studies active galactic nuclei (AGN) and the cosmic X-ray background, using data from space telescopes like Chandra, XMM-Newton, and NuSTAR to investigate the growth of supermassive black holes.

Michael McDonald
Co-Investigator
Michael McDonald is an astrophysicist at the MIT Kavli Institute for Astrophysics and Space Research. He specializes in multiwavelength studies of galaxy clusters, including the Phoenix Cluster, focusing on topics such as star formation, cooling flows, and black hole feedback in cluster cores.

Eileen Meyer
Co-Investigator
Eileen T. Meyer is an associate professor of physics at the University of Maryland, Baltimore County (UMBC). Her research centers on extragalactic jets, particularly high-resolution imaging of active galactic nuclei with the Hubble Space Telescope.

Eric Miller
Co-Investigator
Eric Miller is a research scientist at MIT’s Kavli Institute for Astrophysics and Space Research. He works on observational X-ray astrophysics, including instrument calibration and the study of diffuse emission in clusters of galaxies.

Richard Mushotzky
Co-Investigator
Richard Mushotzky is a professor of astronomy at the University of Maryland, College Park. A pioneer in X-ray astronomy, he has extensively researched active galaxies, black hole demographics, and the physics of clusters of galaxies. He developed his first mission concept for AXIS around 2016. Chair, Senior Advisory Board.

Melania Nynka
Collaborator
Melania (Marina) Nynka is a research scientist at MIT. She is engaged in X-ray data analysis and interpretation, particularly for neutron stars and supernova remnants, often combining Chandra observations with other wavelengths.

Takashi Okajima
Co-Investigator
Takashi Okajima is an astrophysicist at NASA’s Goddard Space Flight Center, contributing to the development of X-ray optics and missions. His work involves advanced X-ray detector technologies for high-resolution astronomical observations. AXIS X-ray Mirror Scientist.

Fabio Pacucci
Collaborator
Fabio Pacucci is an astrophysicist at the Center for Astrophysics | Harvard & Smithsonian. He studies the formation and evolution of the first black holes in the early Universe, using theoretical models and observational data from next-generation telescopes.

Helen Russell
Co-Investigator
Helen Russell is an astrophysicist at the University of Nottingham in the UK. She specializes in the study of galaxy clusters, employing multiwavelength observations to explore cluster cores, feedback processes, and the role of supermassive black holes. Co-Lead, Galaxies/Feedback WG.

Samar Safi-Harb
Co-Investigator
Samar Safi-Harb is a professor of physics and astronomy at the University of Manitoba in Canada. Her research focuses on high-energy astrophysics, particularly supernova remnants and neutron stars, using multiwavelength observations to study extreme astrophysical environments. Co-Lead, Compact Objects WG.

Keivan Stassun
Co-Investigator
Keivan Stassun is a professor of physics and astronomy at Vanderbilt University. He leads research on exoplanets, stellar astrophysics, and data-driven approaches to characterize stellar properties and planet-hosting stars.

Anna Luiza Trindade Falcão
Collaborator
Anna Luiza Trindade Falcão is affiliated with the Center for Astrophysics | Harvard & Smithsonian. Her work involves theoretical and observational studies of black holes, galaxy evolution, and the high-redshift Universe.

Stephen Walker
Collaborator
Stephen Walker is an astrophysicist at the University of Alabama in Huntsville. His research leverages X-ray observations of galaxy clusters to investigate cluster mergers, turbulence, and the thermodynamic profiles of the intracluster medium.

Brian Williams
Co-Investigator
Brian Williams is an astrophysicist at NASA’s Goddard Space Flight Center. His research concentrates on supernova remnants and the end stages of massive star evolution, integrating observations from space- and ground-based telescopes.

Joern Wilms
Co-Investigator
Joern Wilms is a professor at the Dr. Karl Remeis Observatory, University of Erlangen-Nuremberg in Germany. He focuses on high-energy astrophysics, investigating accretion physics and relativistic effects near black holes and neutron stars. In charge of AXIS compatibility of the science simulation package SIXTE.

Mihoko Yukita
Co-Investigator
Mihoko Yukita is a research scientist at Johns Hopkins University. Her interests lie in X-ray astronomy, including studies of galaxies and clusters to understand the mechanisms behind hot gas emission and galaxy evolution.

William Zhang
Co-Investigator
William Zhang is a senior astrophysicist at NASA’s Goddard Space Flight Center. He is a key figure in the development of X-ray missions and technologies, including detector design and mission concept studies for high-energy astrophysics. Lead Scientist, AXIS X-ray Mirror.