An X-ray and Radio Study of the Hubble Frontier Field Cluster Abell S1063

Abstract

We present results from \textit{Chandra} X-ray observations and 325 MHz Giant Metrewave Radio Telescope (GMRT) observations of the massive and X-ray luminous cluster of galaxies Abell S1063. We report the detection of large-scale \lq\lq excess brightness\rq\rq\ in the residual \textit{Chandra} X-ray surface brightness map, which extends at least 2.7 Mpc towards the north-east from the center of the cluster. We also present a high fidelity X-ray flux and temperature map using \textit{Chandra} archival data of 122 ksec, which shows the disturbed morphology in the cluster. The residual flux map shows the first observational confirmation of the merging axis proposed by earlier simulation by \citet{Gomez2012AJ....144...79G}. The average temperature within $R_{500}$ is $11.7\pm 0.56$ keV, which makes AS1063 one of the hottest clusters in the nearby Universe. The integrated radio flux density at 325 MHz is found to be $62.0\pm 6.3$ mJy. The integrated spectrum of the radio halo follows a power-law with a spectral index $\alpha =-1.43\pm 0.13$. The radio halo is found to be significantly under-luminous, which favored for both the hadronic as well as the turbulent re-acceleration mechanism for its origin.

Accepted for publication in MNRAS (12 pages, 8 figures, 2 tables)

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• CLASH-VLT: Abell~S1063. Cluster assembly history and spectroscopic catalogue
• Improved strong lensing modelling of galaxy clusters using the Fundamental Plane: Detailed mapping of the baryonic and dark matter mass distribution of Abell S1063
• Dark Matter in Galaxy Clusters: a Parametric Strong Lensing Approach
• The intracluster light on Frontier Fields clusters Abell 370 and Abell S1063
• Exploring diffuse radio emission in galaxy clusters and groups with the uGMRT and the SKA
• Radio halos and relics from extended cosmic-ray ion distributions with strong diffusion in galaxy clusters
• On the detection of multiple shock fronts in A1914 using deep Chandra X-ray observations
• Unveiling The Origin of Peculiar Diffuse Radio Emission in Abell 1351
• Dynamics of the galactic component of Abell S1063 and MACS J1206.2$-$0847
• GLACE survey: OSIRIS/GTC tuneable imaging of the galaxy cluster ZwCl 0024.0+1652 II. The mass--metallicity relationship and the effect of the environment