Chandra Study of the Massive and Distant Galaxy Cluster SDSS J0150-1005
Abstract
In this work, we present a high spatial resolution study of a fossil cluster, SDSS J0150-1005 (z 0.364), based on the imaging spectroscopic analysis of \ observation. The \ X-ray image shows a relax and symmetric morphology, which indicates SDSS J0150-1005 is a well-developed galaxy cluster with no sign of recent merger. Its global gas temperature is 5.73 0.80 keV, and the virial mass is 6.23 1.34 × 1014 M according to the isothermal model. Compared with polytropic temperature model, the mass calculated based on isothermal model overestimates 49 11%. The central gas entropy, S0.1r200 = 143.9 18.3 keV cm2, is significantly lower than average value of the normal galaxy clusters with similar temperatures. Our results indicate the early formation epoch of SDSS J0150-1005.