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The new fundamental plane dictating galaxy cluster evolution

Published online by Cambridge University Press:  10 June 2020

Yutaka Fujita ,
Keiichi Umetsu ,
Elena Rasia ,
Massimo Meneghetti ,
Megan Donahue ,
Elinor Medezinski ,
Nobuhiro Okabe ,
Marc Postman  and
Stefano Ettori
Yutaka Fujita
Affiliation:
Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka, Osaka560-0043, Japan email: fujita@astro-osaka.jp
Keiichi Umetsu
Affiliation:
Institute of Astronomy and Astrophysics, Academia Sinica, P.O. Box 23-141, Taipei10617, Taiwan
Elena Rasia
Affiliation:
INAF, Osservatorio Astronomico di Trieste, via Tiepolo 11, I-34131, Trieste, Italy
Massimo Meneghetti
Affiliation:
Osservatorio di Astrofisica e Scienza dello Spazio, via Pietro Gobetti 93/3, 40129 Bologna, Italy Sezione di Bologna, viale Berti Pichat 6/2, I-40127 Bologna, Italy
Megan Donahue
Affiliation:
Physics and Astronomy Department, Michigan State University, East Lansing, MI48824, USA
Elinor Medezinski
Affiliation:
Department of Astrophysical Sciences, 4 Ivy Lane, Princeton, NJ08544, USA
Nobuhiro Okabe
Affiliation:
Department of Physical Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima739-8526, Japan
Marc Postman
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD21208, USA
Stefano Ettori
Affiliation:
Osservatorio di Astrofisica e Scienza dello Spazio, via Pietro Gobetti 93/3, 40129 Bologna, Italy Sezione di Bologna, viale Berti Pichat 6/2, I-40127 Bologna, Italy
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Abstract

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In this study, we show that the characteristic radius rs, mass Ms, and the X-ray temperature, TX, of galaxy clusters form a thin plane in the space of (log rs, log Ms, log TX). This tight correlation indicates that the cluster structure including the temperature is affected by the formation time of individual clusters. Numerical simulations show that clusters move along the fundamental plane as they evolve. The plane and the cluster evolution within the plane can be explained by a similarity solution of structure formation. The angle of the plane shows that clusters have not achieved “virial equilibrium”. The details of this study are written in Fujita et al. (2018a,b).

Keywords

galaxies: clusters: generallarge-scale structure of universe
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S341: Challenges in Panchromatic Modelling with Next Generation Facilities , November 2019 , pp. 271 - 272
Copyright
© International Astronomical Union 2020

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