Vol 24, No 4

Weak Merging Scenario of CLASH Cluster A209

Wen-Cheng Feng, Heng Yu, Hai-Hui Zhao, Xiao-Lan Hou, Shu-Mei Jia, Cheng-Kui Li, Yu-Lin Cheng, Paolo Tozzi, Ming Sun and Yong Chen


We study the structural and dynamical properties of A209 based on Chandra and XMM-Newton observations. We obtain detailed temperature, pressure, and entropy maps with the contour binning method, and find a hot region in the NW direction. The X-ray brightness residual map and corresponding temperature profiles reveal a possible shock front in the NW direction and a cold front feature in the SE direction. Combined with the galaxy luminosity density map we propose a weak merger scenario. A young sub-cluster passing from the SE to NW direction could explain the optical subpeak, the intracluster medium temperature map, the X-ray surface brightness excess, and the X-ray peak offset together.


Key words: X-rays: galaxies: clusters – galaxies: clusters: intracluster medium – galaxies: clusters: Abell 209

Full Text

There are currently no refbacks.