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http://hdl.handle.net/20.500.12386/32161
Title: | CLUMP-3D: the lack of non-thermal motions in galaxy cluster cores | Authors: | Sayers, Jack Sereno, Mauro ETTORI, STEFANO RASIA, ELENA Cui, Weiguang Golwala, Sunil Umetsu, Keiichi Yepes, Gustavo |
Issue Date: | 2021 | Journal: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Number: | 505 | Issue: | 3 | First Page: | 4338 | Abstract: | We report the non-thermal pressure fraction (P<SUB>nt</SUB>/P<SUB>tot</SUB>) obtained from a three-dimensional triaxial analysis of 16 galaxy clusters in the CLASH sample using gravitational lensing (GL) data primarily from Subaru and HST, X-ray spectroscopic imaging from Chandra, and Sunyaev-Zel'dovich effect (SZE) data from Planck and Bolocam. Our results span the approximate radial range 0.015-0.4 R<SUB>200m</SUB> (~35-1000 kpc). At cluster-centric radii smaller than 0.1 R<SUB>200m</SUB> the ensemble average P<SUB>nt</SUB>/P<SUB>tot</SUB> is consistent with zero with an upper limit of 9 per cent, indicating that heating from active galactic nuclei and other relevant processes does not produce significant deviations from hydrostatic equilibrium (HSE). The ensemble average P<SUB>nt</SUB>/P<SUB>tot</SUB> increases outside of this radius to approximately 20 per cent at 0.4 R<SUB>200m</SUB>, as expected from simulations, due to newly accreted material thermalizing via a series of shocks. Also in agreement with simulations, we find significant cluster-to-cluster variation in P<SUB>nt</SUB>/P<SUB>tot</SUB> and little difference in the ensemble average P<SUB>nt</SUB>/P<SUB>tot</SUB> based on dynamical state. We conclude that on average, even for diverse samples, HSE-derived masses in the very central regions of galaxy clusters require only modest corrections due to non-thermal motions. | URI: | http://hdl.handle.net/20.500.12386/32161 | URL: | https://academic.oup.com/mnras/article/505/3/4338/6287586?login=false | ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stab1542 | Bibcode ADS: | 2021MNRAS.505.4338S | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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CLUMP-3D- the lack of_stab1542.pdf | PDF editoriale | 2.69 MB | Adobe PDF | View/Open |
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