Volume 545, September 2012
|Number of page(s)||5|
|Section||Cosmology (including clusters of galaxies)|
|Published online||13 September 2012|
Deprojected analysis of Abell 1835 observed with Chandra and compared with XMM-Newton
Key Laboratory for Particle Astrophysics, Institute of High Energy Physics,
Chinese Academy of Sciences,
19B Yuquan Road, 100049
2 Department of Physics, Yunnan University, 650091 Kunming, PR China
Received: 5 December 2011
Accepted: 18 July 2012
Using a deprojection technique, we study the X-ray properties of the galaxy cluster Abell 1835 observed with Chandra, including temperature, abundance, electron density, gas mass fraction, and total mass. A comparison with the results without deprojection shows that the properties do not change much. When we compare the results with those of XMM-Newton, the difference between the temperature profiles derived from Chandra and XMM-Newton data still exists, even if the point-spread function effect of XMM-Newton is corrected. To investigate the reasons for the difference, we used the spectra to cross-calibrate the temperatures. They show that the Chandra spectra can be fitted well with XMM-Newton temperatures. Furthermore, we derive the electron density profile from Chandra data with XMM-Newton temperatures and calculate the projected mass, which is consistent with the XMM-Newton mass and a little lower than the weak lensing mass at r500. Thus, it seems that the temperature derived from XMM-Newton may be more reliable.
Key words: galaxies: clusters: individual: Abell 1835 / X-rays: galaxies: clusters / galaxies: clusters: intracluster medium
© ESO, 2012
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.