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  1. OA@INAF
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  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
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Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/29275
Title: Constraining Gas Motions in the Intra-Cluster Medium
Authors: Simionescu, Aurora
ZuHone, John
Zhuravleva, Irina
Churazov, Eugene
GASPARI, MASSIMO 
Nagai, Daisuke
Werner, Norbert
Roediger, Elke
Canning, Rebecca
Eckert, Dominique
Gu, Liyi
Paerels, Frits
Issue Date: 2019
Journal: SPACE SCIENCE REVIEWS 
Number: 215
Issue: 2
Abstract: The detailed velocity structure of the diffuse X-ray emitting intra-cluster medium (ICM) remains one of the last missing key ingredients in understanding the microphysical properties of these hot baryons and constraining our models of the growth and evolution of structure on the largest scales in the Universe. Direct measurements of the gas velocities from the widths and shifts of X-ray emission lines were recently provided for the central region of the Perseus Cluster of galaxies by Hitomi, and upcoming high-resolution X-ray microcalorimeters onboard XRISM and Athena are expected to extend these studies to many more systems. In the mean time, several other direct and indirect methods have been proposed for estimating the velocity structure in the ICM, ranging from resonant scattering to X-ray surface brightness fluctuation analysis, the kinematic Sunyaev-Zeldovich effect, or using optical line emitting nebulae in the brightest cluster galaxies as tracers of the motions of the ambient plasma. Here, we review and compare the existing estimates of the velocities of the hot baryons, as well as the various overlapping physical processes that drive motions in the ICM, and discuss the implications of these measurements for constraining the viscosity and identifying the source of turbulence in clusters of galaxies.
URI: http://hdl.handle.net/20.500.12386/29275
URL: https://link.springer.com/article/10.1007/s11214-019-0590-1
ISSN: 0038-6308
DOI: 10.1007/s11214-019-0590-1
Bibcode ADS: 2019SSRv..215...24S
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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1902.00024.pdfpostprint7.84 MBAdobe PDFView/Open
Simionescu_2019_ICM_kinematics_probes_review.pdf[Administrators only]6.16 MBAdobe PDF
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