Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-02-27
Astronomy and Astrophysics
Astrophysics
4 pages, 2 figures, Accepted for publication in A&A Letters
Scientific paper
10.1051/0004-6361:20064835
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 - 4.0 keV, 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 3.2 x 10e-13 erg/cm^2 s, in the 0.3 - 10 keV energy range, to the non-thermal emission in the relic region. This leads to a magnetic field B > 1.05 microG.
Feretti Luigina
Neumann Doris M.
No associations
LandOfFree
XMM-Newton observations of the Coma cluster relic 1253+275 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with XMM-Newton observations of the Coma cluster relic 1253+275, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and XMM-Newton observations of the Coma cluster relic 1253+275 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-485563