UNBIASED CORRECTION RELATIONS FOR GALAXY CLUSTER PROPERTIES DERIVED FROM CHANDRA AND XMM-NEWTON
文献类型：期刊论文
| 作者 | 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
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2015 |
| 卷号 | 799期号:1页码:47 |
| 关键词 | galaxies: clusters: general galaxies: clusters: intracluster medium X-rays: galaxies: clusters |
| 通讯作者 | 赵海辉 |
| 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. |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 收录类别 | SCI ; CA |
| WOS记录号 | WOS:000348214500045 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/228135]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 推荐引用方式 GB/T 7714 | 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. |
入库方式： OAI收割
来源：高能物理研究所
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