Physics of cosmic plasmas from high angular resolution X-ray imaging of galaxy clusters

Maxim Markevitch; Esra Bulbul; Eugene Churazov; Simona Giacintucci; Ralph Kraft; Matthew Kunz; Daisuke Nagai; Elke Roediger; Mateusz Ruszkowski; Alex Schekochihin; Reinout van Weeren; Alexey Vikhlinin; Stephen A. Walker; Qian H. S. Wang; Norbert Werner; Daniel Wik; Irina Zhuravleva; John ZuHone

arXiv · 1903.06356

Physics of cosmic plasmas from high angular resolution X-ray imaging of galaxy clusters

Maxim Markevitch·Esra Bulbul·Eugene Churazov·Simona Giacintucci·Ralph Kraft·Matthew Kunz·Daisuke Nagai·Elke Roediger·Mateusz Ruszkowski·Alex Schekochihin·Reinout van Weeren·Alexey Vikhlinin·Stephen A. Walker·Qian H. S. Wang·Norbert Werner·Daniel Wik·Irina Zhuravleva·John ZuHone

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Abstract

Galaxy clusters are massive dark matter-dominated systems filled with X-ray emitting, optically thin plasma. Their large size and relative simplicity (at least as astrophysical objects go) make them a unique laboratory to measure some of the interesting plasma properties that are inaccessible by other means but fundamentally important for understanding and modeling many astrophysical phenomena -- from solar flares to black hole accretion to galaxy formation and the emergence of the cosmological Large Scale Structure. While every cluster astrophysicist is eagerly anticipating the direct gas velocity measurements from the forthcoming microcalorimeters onboard XRISM, Athena and future missions such as Lynx, a number of those plasma properties can best be probed by high-resolution X-ray imaging of galaxy clusters. Chandra has obtained some trailblazing results, but only grazed the surface of such studies. In this white paper, we discuss why we need arcsecond-resolution, high collecting area, low relative background X-ray imagers (with modest spectral resolution), such as the proposed AXIS and the imaging detector of Lynx.

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Maxim Markevitch, Esra Bulbul, Eugene Churazov, Simona Giacintucci, Ralph Kraft, Matthew Kunz, Daisuke Nagai, Elke Roediger, Mateusz Ruszkowski, Alex Schekochihin, Reinout van Weeren, Alexey Vikhlinin, Stephen A. Walker, Qian H. S. Wang, Norbert Werner, Daniel Wik, Irina Zhuravleva, John ZuHone. 2019-03-15. Physics of cosmic plasmas from high angular resolution X-ray imaging of galaxy clusters. https://arxiv.org/abs/1903.06356

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