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NASA Selects AXIS for Phase A Study

AXIS received $5 million to conduct a 12-month mission concept study. After a detailed evaluation of the study, NASA expects to select one concept in 2026 to proceed with construction, for a launch in 2032. Read more.

AXIS team at AAS January 2025

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.


Portrait of Christopher Reynolds

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.

Portrait of Erin Kara

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.

Portrait of Andrew Ptak

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

Portrait of Steven Allen

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.

Portrait of Franz Bauer

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.

Portrait of Marshall Bautz

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.

Portrait of Arash Bodaghee

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.

Portrait of Kevin Burdge

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.

Portrait of Nico Cappelluti

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

Portrait of Brad Cenko

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

Portrait of Kai-Wing Chan

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

Portrait of George Chartas

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.

Portrait of Lia Corrales

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

Portrait of Tansu Daylan

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.

Portrait of Abe Falcone

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

Portrait of Adi Foord

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

Portrait of Catherine Grant

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

Portrait of Melanie Habouzit

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.

Portrait of Daryl Haggard

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

Portrait of Sven Herrmann

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

Portrait of Edmund Hodges-Kluck

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.

Portrait of Oleg Kargaltsev

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.

Portrait of George King

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.

Portrait of Mike Koss

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.

Portrait of Marina Kounkel

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.

Portrait of Laura Lopez

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.

Portrait of Stefano Marchesi

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.

Portrait of Michael McDonald

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.

Portrait of Eileen Meyer

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.

Portrait of Eric Miller

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.

Portrait of Richard Mushotzky

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.

Portrait of Melania Nynka

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.

Portrait of Takashi Okajima

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.

Portrait of Fabio Pacucci

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.

Portrait of Helen Russell

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.

Portrait of Samar Safi-Harb

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.

Portrait of Keivan Stassun

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.

Portrait of Anna Luiza Trindade Falcão

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.

Portrait of Stephen Walker

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.

Portrait of Brian Williams

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.

Portrait of Joern Wilms

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.

Portrait of Mihoko Yukita

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.

Portrait of William Zhang

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.