Deprojected analysis of Abell 1835 observed with Chandra and compared with XMM-Newton
Abstract
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.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- September 2012
- DOI:
- 10.1051/0004-6361/201118578
- arXiv:
- arXiv:1208.2194
- Bibcode:
- 2012A&A...545A.100L
- Keywords:
-
- galaxies: clusters: individual: Abell 1835;
- X-rays: galaxies: clusters;
- galaxies: clusters: intracluster medium;
- Astrophysics - Cosmology and Nongalactic Astrophysics
- E-Print:
- 7 pages, 5 figures, accepted for publication in A&