NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-04-23 T04:20:05 PDT
Help | Comment | NED Home

For refcode 2015ApJ...799...47Z:
Retrieve 71 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2015ApJ...799...47Z Unbiased Correction Relations for Galaxy Cluster Properties Derived from Chandra and XMM-Newton Zhao, Hai-Hui; Li, Cheng-Kui; Chen, Yong; Jia, Shu-Mei; Song, Li-Ming Abstract. We use a sample of 62 clusters of galaxies to investigate the discrepancies between the gas temperature and total mass within r_500_ from XMM-Newton and Chandra data. Comparisons of the properties show that (1) both the de-projected and projected temperatures determined by Chandra are higher than those of XMM-Newton and there is a good linear relationship for the de-projected temperatures: T_Chandra_ = 1.25 x T_XMM_-0.13. (2) The Chandra mass is much higher than the XMM-Newton mass with a bias of 0.15 and our mass relation is log_10_ M_Chandra_ = 1.02 x log_10_ M_XMM_+0.15. To explore the reasons for the discrepancy in mass, we recalculate the Chandra mass (expressed as M_Ch^mo/d) by modifying its temperature with the de-projected temperature relation. The results show that M_Ch^mo/d is closer to the XMM-Newton mass with the bias reducing to 0.02. Moreover, M_Ch^mo/d are corrected with the r_500_ measured by XMM-Newton and the intrinsic scatter is significantly improved with the value reducing from 0.20 to 0.12. These mean that the temperature bias may be the main factor causing the mass bias. Finally, we find that M_Ch^mo/d is consistent with the corresponding XMM-Newton mass derived directly from our mass relation at a given Chandra mass. Thus, the de-projected temperature and mass relations can provide unbiased corrections for galaxy cluster properties derived from Chandra and XMM-Newton. Key words: galaxies: clusters: general, galaxies: clusters: intracluster medium, X-rays: galaxies: clusters
Retrieve 71 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home