Volume 493, Number 1, January I 2009
|Page(s)||13 - 21|
|Section||Cosmology (including clusters of galaxies)|
|Published online||27 October 2008|
Non-thermal emission in the core of Perseus: results from a long XMM-Newton observation
IASF-Milano, INAF, via Bassini 15, 20133 Milano, Italy e-mail: email@example.com
2 Dip. di Astronomia, Università di Bologna, via Ranzani 1, 40127 Bologna, Italy e-mail: firstname.lastname@example.org
3 INAF, Osservatorio Astronomico di Bologna, via Ranzani 1, Bologna 40127, Italy
4 Department of Physics and Astronomy, University of California at Irvine, 4129 Frederick Reines Hall, Irvine, CA 92697-4575, USA
Accepted: 21 July 2008
We employ a long XMM-Newton observation of the core of the Perseus cluster to validate claims of a non-thermal component discovered with Chandra. From a meticulous analysis of our dataset, which includes a detailed treatment of systematic errors, we find the 2–10 keV surface brightness of the non-thermal component to be less than about 5 10-16 erg cm-2 s-1 arcsec-2. The most likely explanation for the discrepancy between the XMM-Newton and Chandra estimates is a problem in the effective area calibration of the latter. Our EPIC-based magnetic field lower limits do not disagree with Faraday rotation measure estimates on a few cool cores and with a minimum energy estimate on Perseus. In the not too distant future Simbol-X may allow detection of non-thermal components with intensities more than 10 times lower than those that can be measured with EPIC; nonetheless even the exquisite sensitivity within reach for Simbol-X might be insufficient to detect the IC emission from Perseus.
Key words: galaxies: clusters: general / galaxies: clusters: individual: Perseus / X-rays: galaxies: clusters
© ESO, 2008
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.