Shapley Supercluster Survey (ShaSS): Galaxy Evolution from Filaments to Cluster Cores
P. Merluzzi, G. Busarello, C. P. Haines, A. Mercurio, N. Okabe, K. A. Pimbblet, M. A. Dopita, A. Grado, L. Limatola, H. Bourdin, P. Mazzotta, M. Capaccioli, N. … 展开作者
P. Merluzzi, G. Busarello, C. P. Haines, A. Mercurio, N. Okabe, K. A. Pimbblet, M. A. Dopita, A. Grado, L. Limatola, H. Bourdin, P. Mazzotta, M. Capaccioli, N. R. Napolitano, P. Schipani
备注：
22 pages, 11 figures. Accepted for publication on MNRAS
We present an overview of a multi-wavelength survey of the Shapley supercluster (SSC; z~0.05) covering a contiguous area of 260 h^-2_70 Mpc^2 including the supercluster core. The project main aim is to quantify the influence of cluster-scale mass assembly on galaxy evolution in one of the most massive structures in the local Universe. The Shapley supercluster survey (ShaSS) includes nine Abell clusters (A3552, A3554, A3556, A3558, A3559, A3560, A3562, AS0724, AS0726) and two poor clusters (SC1327- 312, SC1329-313) showing evidence of cluster-cluster interactions. Optical (ugri) and near-infrared (K) imaging acquired with VST and VISTA allow us to study the galaxy population down to m*+6 at the supercluster redshift. A dedicated spectroscopic survey with AAOmega on the Anglo-Australian Telescope provides a magnitude-limited sample of supercluster members with 80% completeness at ~m*+3.
We derive the galaxy density across the whole area, demonstrating that all structures within this area are embedded in a single network of clusters, groups and filaments. The stellar mass density in the core of the SSC is always higher than 9E09 M_sun Mpc^-3, which is ~40x the cosmic stellar mass density for galaxies in the local Universe. We find a new filamentary structure (~7 Mpc long in projection) connecting the SSC core to the cluster A3559, as well as previously unidentified density peaks. We perform a weak-lensing analysis of the central 1 sqdeg field of the survey obtaining for the central cluster A3558 a mass of M_500=7.63E14 M_sun, in agreement with X-ray based estimates.
Neutral Hydrogen in the Shapley Supercluster Core I: Environmental Effects on Gas Content and Galaxy Evolution
Rhodes University（罗德斯大学）；INAF–Istituto di Radioastronomia（意大利国家天体物理研究所射电天文研究所）；INAF–Osservatorio Astronomico di Capodimonte（意大利国家天体物理研究所卡波迪蒙特天文台）；South African Radio Astronomy Observatory（南非射电天文观测台）
Magnetic Fields in the Shapley Supercluster Core with POSSUM: Challenging Model Predictions
Universidad Complutense de Madrid（马德里康普顿斯大学）；Università degli Studi di Bologna（博洛尼亚大学）；INAF – Istituto di Radioastronomia（意大利国家天体物理研究所射电天文研究所）；The University of Chicago（芝加哥大学）；Dunlap Institute for Astronomy and Astrophysics, University of Toronto（多伦多大学邓普勒天文学与天体物理研究所）；The Australian National University（澳大利亚国立大学）；National Research Council Canada, Herzberg Research Centre for Astronomy and Astrophysics（加拿大国家研究委员会赫茨伯格天文学与天体物理研究中心）
Cosmic dance in the Shapley Concentration Core II. The uGMRT-MeerKAT view of filaments in the brightest cluster galaxies and tailed radio galaxies in the A3528 cluster complex
本文利用 uGMRT 和 MeerKAT 射电观测结合 eROSITA X 射线数据，研究沙普利超星系团核心 A3528 复合体，发现最亮团星系周围存在谱指数极陡的弥散射电纤维，并提出小型并合可重新加速射电星系等离子体。
Rates of tidal disruption events from constrained cosmological simulations of the local Universe: population properties and implications for transient surveys
Ludwig-Maximilians Universität（路德维希-马克西米利安大学）；University of Oxford（牛津大学）；Max-Planck-Institut für Astrophysik（马克斯·普朗克天体物理学研究所）
The X-ray properties and structure of A3571 up to $R_{500}$
Beijing Normal University（北京师范大学）；Institute of High Energy Physics, Chinese Academy of Sciences（中国科学院高能物理研究所）；Max Planck Institute for Extraterrestrial Physics（马克斯·普朗克地外物理研究所）
