Probing Macro-Scale Gas Motions and Turbulence in Diffuse Cosmic Plasmas
Esra Bulbul, Massimo Gaspari, Gabriella Alvarez, Camille Avestruz, Mark Bautz, Brad Benson, Veronica Biffi, Douglas Burke, Nicolas Clerc, Urmila Chadayammuri, E… 展开作者
Esra Bulbul, Massimo Gaspari, Gabriella Alvarez, Camille Avestruz, Mark Bautz, Brad Benson, Veronica Biffi, Douglas Burke, Nicolas Clerc, Urmila Chadayammuri, Eugene Churazov, Edoardo Cucchetti, Dominique Eckert, Stefano Ettori, Bill Forman, Fabio Gastaldello, Vittorio Ghirardini, Ralph Kraft, Maxim Markevitch, Mike McDonald, Eric Miller, Tony Mroczkowski, Daisuke Nagai, Paul Nulsen, Gabriel W. Pratt, Scott Randall, Thomas Reiprich, Mauro Roncarelli, Aurora Simionescu, Randall Smith, Grant Tremblay, Stephen Walker, Irina Zhuravleva, John ZuHone
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5 pages, 3 figures, Science white paper submitted to the Astro2020 Decadal Survey
Clusters of galaxies, the largest collapsed structures in the Universe, are located at the intersection of extended filaments of baryons and dark matter. Cosmological accretion onto clusters through large scale filaments adds material at cluster outskirts. Kinetic energy in the form of bulk motions and turbulence due to this accretion provides a form of pressure support against gravity, supplemental to thermal pressure. Significant amount of non-thermal pressure support could bias cluster masses derived assuming hydrostatic equilibrium, the primary proxy for cluster cosmology studies. Sensitive measurements of Doppler broadening and shift of astrophysical lines, and the relative fluctuations in thermodynamical quantities (e.g., density, pressure, and entropy) are primary diagnostic tools. Forthcoming planned and proposed X-ray (with large etendue, throughput, and high spectral resolution) and SZ observatories will provide crucial information on the assembly and virialisation processes of clusters, involving turbulent eddies cascading at various spatial scales and larger gas bulk motions in their external regions to the depth or their potential wells.
Probing the dynamics of extreme galaxies I. Dark matter content in ultra-diffuse galaxies
Scuola Superiore Meridionale（南方高等学院）；Istituto Nazionale di Fisica Nucleare, Sez. di Napoli（意大利国家核物理研究所那不勒斯分部）；Institute of Physics, University of Szczecin（谢扎青大学物理研究所）；Dipartimento di Fisica “E. Pancini”, Università degli Studi di Napoli “Federico II”（那不勒斯费德里科二世大学E.潘奇尼物理系）；Dipartimento di Fisica e Astronomia “G. Galilei”, Università di Padova（帕多瓦大学G.伽利略物理与天文系）
Probing Large-scale Structure and the Multi-Phase IGM at the Cosmic Noon -- Insights from a Joint Survey with Euclid, CSST, JPCam, and JUST
Purple Mountain Observatory, Chinese Academy of Sciences（中国科学院紫金山天文台）；Observatório Nacional（国家天文台）；University of Michigan（密歇根大学）；National Astronomical Observatories, Chinese Academy of Sciences（中国科学院国家天文台）；School of Astronomy and Space Science, University of Chinese Academy of Sciences(UCAS)（中国科学院大学天文与空间科学学院）；Department of Astronomy, Tsinghua University（清华大学天文系）；Department of Physics, University of Milano-Bicocca（米兰比可卡大学物理系）；Shanghai Jiao Tong University（上海交通大学）
