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 ($z\simeq 0.364$), based on the imaging spectroscopic analysis of \chandra\ observation. The \chandra\ 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 $\pm$ 0.80 keV, and the virial mass is 6.23 $\pm$ 1.34 $\times 10^{14}$ M${}_{\odot }$ according to the isothermal model. Compared with polytropic temperature model, the mass calculated based on isothermal model overestimates 49 $\pm$ 11%. The central gas entropy, $S_{0.1r_{200}}=143.9\pm 18.3$ keV cm${}^2$, 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.

11 pages, 4 figures, accepted by RAA

References in corpus (10)

• The Fifth Data Release of the Sloan Digital Sky Survey
• The impact of mergers on relaxed X-ray clusters - I. Dynamical evolution and emergent transient structures
• The Formation of Fossil Galaxy Groups in the hierarchical Universe
• Scaling relations in fossil galaxy groups
• Structure and scaling of the entropy in nearby galaxy clusters
• XMM-Newton observations of three poor clusters: Similarity in dark matter and entropy profiles down to low mass
• Scaling relations and mass calibration of the X-ray luminous galaxy clusters at z~0.2: XMM-Newton observations
• ESO 3060170 -- a massive fossil galaxy group with a heated gas core?
• Fossil Groups in the Sloan Digital Sky Survey
• A fossil galaxy cluster; an X-ray and optical study of RX J1416.4+2315