Observation of a very massive galaxy cluster at z=0.76 in SRG/eROSITA all-sky survey
R. A. Burenin, I. F. Bikmaev, M. R. Gilfanov, A. A. Grokhovskaya, S. N. Dodonov, M. V. Eselevich, I. A. Zaznobin, E. N. Irtuganov, N. S. Lyskova, P. S. Medvedev… 展开作者
R. A. Burenin, I. F. Bikmaev, M. R. Gilfanov, A. A. Grokhovskaya, S. N. Dodonov, M. V. Eselevich, I. A. Zaznobin, E. N. Irtuganov, N. S. Lyskova, P. S. Medvedev, A. V. Meshcheryakov, A. V. Moiseev, S. Yu. Sazonov, A. A. Starobinsky, R. A. Sunyaev, R. I. Uklein, I. I. Khabibullin, I. M. Khamitov, E. M. Churazov
备注：
10 pages, 6 figures, accepted for publication in Astronomy Letters
The results of multiwavelength observations of the very massive galaxy cluster SRGe CL2305.2-2248 detected in X-rays during the first SRG/eROSITA all-sky survey are discussed. This galaxy cluster was also detected earlier in microwave band through the observations of Sunyaev-Zeldovich effect in South Pole Telescope (SPT-CL J2305-2248), and in Atacama Cosmological Telescope (ACT-CL J2305.1-2248) surveys. Spectroscopic redshift measurement, $z=0.7573$, was measured at the Russian 6-m BTA telescope of SAO RAS, in good agreement with its photometric estimates, including a very accurate one obtained using machine learning methods. In addition, deep photometric measurements were made at the Russian-Turkish 1.5-m telescope (RTT150), which allows to study cluster galaxies red sequence and projected galaxies distribution. Joint analysis of the data from X-ray and microwave observations show that this cluster can be identified as a very massive and distant one using the measurements of its X-ray flux and integral comptonization parameter only. The mass of the cluster estimated according to the eROSITA data is $M_{500}=(9.0\pm2.6)\cdot10^{14}\, M_\odot$. We show that this cluster is found among of only several dozen of the most massive clusters in the observable Universe and among of only a few the most massive clusters of galaxies at $z>0.6$.
The SRG/eROSITA All-Sky Survey $J$-Band Follow-Up Observations for Selected High-Redshift Galaxy Cluster Candidates
University of Innsbruck（因斯布鲁克大学）；Max Planck Institute for Extraterrestrial Physics（马克斯·普朗克地外物理学研究所）；INAF, Osservatorio di Astrofisica e Scienza dello Spazio（意大利国家天体物理研究所空间天体物理与科学观测站）
The SRG/eROSITA all-sky survey: The morphologies of clusters of galaxies: II. The intrinsic distributions of morphological parameters
Max-Planck-Institut für extraterrestrische Physik（马克斯·普朗克地外物理学研究所）；IRAP, CNRS, UPS, CNES（法国国家科学研究中心/图卢兹第三大学/欧洲空间局天体物理研究所）；Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University（北京师范大学天文与前沿科学研究院）；Argelander-Institut für Astronomie (AIfA), Universität Bonn（波恩大学阿尔兰德尔天文学研究所）
The SRG/eROSITA All-Sky Survey. The Weak-Lensing Mass Calibration and the Stellar Mass-to-Halo Mass Relation from the Hyper Suprime-Cam Subaru Strategic Program
National Cheng Kung University（国立成功大学）；Max Planck Institute for Extraterrestrial Physics（马克斯·普朗克地外物理研究所）；INAF, Osservatorio di Astrofisica e Scienza dello Spazio（意大利国家天体物理研究所空间科学天文台）；Hiroshima University（广岛大学）；Academia Sinica（中央研究院）；Chiba University（千叶大学）；National Yang Ming Chiao Tung University（国立阳明交通大学）
The SRG/eROSITA All-Sky Survey: Early dark energy and Hubble constant from the cluster mass function
Max Planck Institute for Extraterrestrial Physics（马克斯·普朗克地外物理研究所）；LMU München（慕尼黑大学）；Universität Innsbruck（因斯布鲁克大学）；IRAP, Université de Toulouse, CNRS, UPS, CNES（图卢兹大学/法国国家科学研究中心/法国航天研究中心天体物理学与行星学研究所）；INAF, Osservatorio di Astrofisica e Scienza dello Spazio（意大利国家天体物理研究所空间天体物理观测站）；Beijing Normal University（北京师范大学）；Université Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3（格勒诺布尔阿尔卑斯大学）；National Cheng Kung University（国立成功大学）；Nagoya University（名古屋大学）；The University of Tokyo（东京大学）
The Abell 3391/95 galaxy cluster system: A 15 Mpc intergalactic medium emission filament, a warm gas bridge, infalling matter clumps, and (re-) accelerated plasma discovered by combining SRG/eROSITA data with ASKAP/EMU and DECam data
The SRG/eROSITA All-Sky Survey. Detection of shock-heated gas beyond the halo boundary into the accretion region
Max Planck Institute for Extraterrestrial Physics（马克斯·普朗克地外物理研究所）；Department of Astronomy, University of Maryland（马里兰大学天文学系）；INAF, Osservatorio di Astrofisica e Scienza dello Spazio（意大利国家天体物理研究所空间科学天文台）；Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University（北京师范大学天文与前沿科学研究院）
The SRG/eROSITA all-sky survey: X-ray scaling relations of galaxy groups and clusters in the western Galactic hemisphere
Max Planck Institute for extraterrestrial Physics（马克斯·普朗克地外物理研究所）；Ludwig-Maximilians-Universität（慕尼黑大学）；INAF, Osservatorio di Astrofisica e Scienza dello Spazio（意大利国家天体物理研究所空间天文台）；IRAP, Université de Toulouse, CNRS, UPS, CNES（图卢兹大学）；Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University（北京师范大学天文与前沿科学研究院）；Argelander-Institut für Astronomie (AIfA), Universität Bonn（波恩大学阿根德纳天文学研究所）
The SRG/eROSITA All-Sky Survey: A comprehensive X-ray analysis of the Hydra I galaxy cluster
Universität Bonn（波恩大学）；Università degli studi di Roma ‘Tor Vergata’（罗马托维尔加塔大学）；INFN, Sezione di Roma 2（意大利国家核物理研究所罗马第二分部）；Max-Planck-Institut für Radioastronomie（马克斯·普朗克射电天文研究所）；Universität Erlangen-Nürnberg（埃尔朗根-纽伦堡大学）
The SRG/eROSITA all-sky survey: Constraints on Ultra-light Axion Dark Matter through Galaxy Cluster Number Counts
Max Planck Institute for Extraterrestrial Physics（马克斯·普朗克地外物理研究所）；Universität Innsbruck, Institut für Astro- und Teilchenphysik（因斯布鲁克大学天体与粒子物理研究所）；INAF, Osservatorio di Astrofisica e Scienza dello Spazio（意大利国家天体物理研究所空间科学与天文观测台）；Department of Physics and Astronomy, Stony Brook University（纽约州立大学石溪分校物理与天文学系）；Universität Hamburg, Hamburger Sternwarte（汉堡大学汉堡天文台）；Department of Physics, National Cheng Kung University（国立成功大学物理系）；IRAP, Université de Toulouse, CNRS, UPS, CNES（图卢兹大学宇宙射线与天体物理学研究所）
