Possible detection of a cool-core in the cluster RXC J1252.5–3116

Kiran Lakhchaura * and K. P. Singh
Tata Institute of Fundamental Research, 1 Homi Bhabha Road, Colaba, Mumbai 400 005, India
Received: February 3 2014 | Accepted: April 21 2014

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Abstract

This paper presents a detailed study of X-ray emission from the cluster RXC J1252.5–3116, based on an analysis of the Chandra archival data. Here we present radial profiles and maps of X-ray surface-brightness, temperature, electron number density, entropy and pressure of RXC J1252.5–3116. We have also estimated the X-ray luminosity, gas mass, cooling time and mass deposition rate for the cluster. The cluster shows an extremely relaxed X-ray morphology and the radial profiles suggest a drop in the temperature of the central gas. We find an extremely small cool-core and a high mass deposition rate of 43 Mʘ per year. RXC J1252.5–3116 seems to host a possible cool core at its centre.



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Keywords : galaxies: clusters: general – galaxies: clusters: individual:(RXC J1252.5– 3116) – galaxies: clusters: intracluster medium — X-rays: galaxies: clusters