Stephen Walker, Ph.D. Associate Professor, Physics and Astronomy Contact 301 Sparkman DriveOptics BuildingRoom 216Huntsville, AL 35899 Campus Map 256.824.2593stephen.walker@uah.edu Biography I started at UAH as an Assistant Professor in 2019. Prior to this I have been a NASA Postdoctoral Program (NPP) Fellow at NASA’s Goddard Space Flight Center, and a postdoctoral researcher at the University of Cambridge. My research concentrates on all aspects of galaxy clusters (the largest collapsed structures in the universe), from the outskirts where they are continuing to form from the cosmic web, to gas sloshing produced by galaxy cluster mergers, to studying AGN feedback in cluster cores, focusing on their X-ray emission. Curriculum Vitae Personal Website Education Ph.D., University of Cambridge, 2014 Master of Physics, University of Oxford, 2010 Research Funding 2020-2023: “Deep Chandra observations of the strong shock in the merging cluster SPT-CLJ2031-4037”, PI: S. A. Walker, $80k, Smithsonian Astrophysical Observatory 2020-2023: “A high resolution view of the extreme 1Mpc radius cold front in A2142”, PI: S. A. Walker, $70k, Smithsonian Astrophysical Observatory 2019-2022: “A complete view of the colossal 700kpc radius cold front in the Perseus cluster”, PI: S. A. Walker, $99k, Smithsonian Astrophysical Observatory 2020-2023: “A detailed view of the group NGC 4839 as it merges with the Coma cluster”, PI: S. A. Walker, $91k, Smithsonian Astrophysical Observatory 2019-2022: “Is there an enormous cold front at the virial radius of the Perseus cluster?”, PI: S. A. Walker, $93k, Smithsonian Astrophysical Observatory 2019-2022: “Probing within the Bondi radius of the ultramassive black hole in NGC 1600”, PI: S. A. Walker, $82k, Smithsonian Astrophysical Observatory 2020-2021: “A complete view of the sloshing activity in the Perseus cluster”. PI: S. A. Walker, $78k, NASA 2020-2021: “The clearest view of the outskirts of a galaxy cluster: the Coma cluster”, PI: S. A. Walker, $108k, NASA 2019-2020: “Is there an enormous cold front at the virial radius of the Perseus cluster?”, PI: S. A. Walker, $70k, NASA Expertise Galaxy Clusters Active Galactic Nuclei Cosmology Recent Publications The Physics of Galaxy Cluster Outskirts. Stephen Walker, Aurora Simionescu, Daisuke Nagai, Nobuhiro Okabe, Dominique Eckert, Tony Mroczkowski, Hiroki Akamatsu, Stefano Ettori, Vittorio Ghirardini, 2019, Space Science Reviews, 215: 7, doi.org/10.1007/s11214-018-0572-8 (arXiv:1810.00890) The split in the ancient cold front in the Perseus cluster. Stephen A. Walker, John ZuHone, Andy Fabian, Jeremy Sanders, 2018, Nature Astronomy 2, 292-296, (arXiv:1803.00898) Is there a giant Kelvin-Helmholtz instability in the sloshing cold front of the Perseus cluster? S. A. Walker, J. Hlavacek-Larrondo, M. Gendron-Marsolais, A. C. Fabian, H. Intema, J. S. Sanders, J. T. Bamford, R. van Weeren, 2017, MNRAS, 468, 2506, (arXiv:1705.00011) X-ray exploration of the outskirts of the nearby Centaurus cluster using Suzaku and Chandra. S. A. Walker, A. C. Fabian, J. S. Sanders, A. Simionescu, Y. Tawara, 2013, MNRAS, 432, 554, (arXiv:1303.4240)