UNBIASED CORRECTION RELATIONS FOR GALAXY CLUSTER PROPERTIES DERIVED FROM CHANDRA AND XMM-NEWTON
Zhao HH(赵海辉); Li CK(李承奎); Chen Y(陈勇); Jia SM(贾淑梅); Song LM(宋黎明); Zhao, HH; Li, CK; Chen, Y; Jia, SM; Song, LM
刊名ASTROPHYSICAL JOURNAL
2015
卷号799期号:1页码:47
关键词galaxies: clusters: general galaxies: clusters: intracluster medium X-rays: galaxies: clusters
学科分类Astronomy & Astrophysics
DOI10.1088/0004-637X/799/1/47
通讯作者赵海辉
文章类型Article
英文摘要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 = 1.25xT(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) MXMM+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.
类目[WOS]Astronomy & Astrophysics
收录类别SCI ; CA
WOS记录号WOS:000348214500045
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228135
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
中国科学院高能物理研究所_粒子天体物理中心
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Zhao HH,Li CK,Chen Y,et al. UNBIASED CORRECTION RELATIONS FOR GALAXY CLUSTER PROPERTIES DERIVED FROM CHANDRA AND XMM-NEWTON[J]. ASTROPHYSICAL JOURNAL,2015,799(1):47.
APA 赵海辉.,李承奎.,陈勇.,贾淑梅.,宋黎明.,...&Song, LM.(2015).UNBIASED CORRECTION RELATIONS FOR GALAXY CLUSTER PROPERTIES DERIVED FROM CHANDRA AND XMM-NEWTON.ASTROPHYSICAL JOURNAL,799(1),47.
MLA 赵海辉,et al."UNBIASED CORRECTION RELATIONS FOR GALAXY CLUSTER PROPERTIES DERIVED FROM CHANDRA AND XMM-NEWTON".ASTROPHYSICAL JOURNAL 799.1(2015):47.
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