Query : 2006A&A...450L..21F

2006A&A...450L..21F - Astronomy and Astrophysics, volume 450, L21-24 (2006/5-2)

XMM-Newton observations of the Coma cluster relic 1253+275.


Abstract (from CDS):

Using XMM Newton data, we investigate the nature of the X-ray emission in the radio relic 1253+275 in the Coma cluster. We determine the conditions of the cluster gas to check current models of relic formation, and we set constraints on the intracluster magnetic field. Both imaging and spectral analysis are performed, and the X-ray emission is compared with the radio emission. We found that the emission is of thermal origin and is connected to the sub-group around NGC 4839. The best-fit gas temperature in the region of the relic and in its vicinity is in the range 2.8-4.0keV, comparable to the temperature of the NGC 4839 sub-group. We do not detect any high temperature gas, resulting from a possible shock in the region of the Coma relic. We therefore suggest that the main source of energy for particles radiating in the radio relic is likely to be turbulence. From the X-ray data, we can also set a flux upper limit of 3.2x10–13erg/cm2/s, in the 0.3-10keV energy range, to the non-thermal emission in the relic region. This leads to a magnetic field B>1.05µG.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: general - galaxies: clusters: individual: Coma - intergalactic medium - X-rays: galaxies: clusters

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 NAME Coma Relic Rad 12 55 +27.2           ~ 57 0
2 NAME NGC 4839 Group GrG 12 57 21.5 +27 31 54           ~ 79 0
3 NGC 4839 rG 12 57 24.3563164776 +27 29 52.203087132 13.56 13.02 12.06     ~ 462 3
4 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 4696 2

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