Chandra measurements of a complete sample of X-ray luminous galaxy clusters: the luminosity–mass relation
Chandra measurements of a complete sample of X-ray luminous galaxy clusters: the luminosity–mass relation
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X 射线发光星系团完整样本的钱德拉测量：光度与质量关系
DOI：
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
N. V. D. Pyl
中科院分区：
文献类型：
--
作者：
P. Giles;B. Maughan;H. Dahle;M. Bonamente;D. Landry;C. Jones;M. Joy;S. Murray;N. V. D. Pyl
我们提出的工作结果，涉及一个统计上完整的样本34星系团，在红移范围0.15\le$z$\le$0.3观察与$钱德拉$。我们研究了团簇样本的发光度-质量（$LM$）关系，质量是通过完整的流体静力质量分析获得的。我们利用一种方法来充分考虑选择偏差时，建模的$LM$关系，并发现，$LM$关系是显着不同的关系建模时，不考虑选择的影响。我们发现我们的星系团的光度比给定质量的平均值高2.20.4倍（当考虑选择效应时），它的质量比给定光度的人口平均值低30%。同样地，使用从这个样本测量的$LM$关系而不校正选择偏差将导致低估40%的具有给定光度的星系团的平均质量。比较流体静力学质量和由$Y_{X}$参数确定的质量估计值，我们发现它们是完全一致的，与星系团的动力学状态无关。
We present the results of work involving a statistically complete sample of 34 galaxy clusters, in the redshift range 0.15$\le$z$\le$0.3 observed with $Chandra$. We investigate the luminosity-mass ($LM$) relation for the cluster sample, with the masses obtained via a full hydrostatic mass analysis. We utilise a method to fully account for selection biases when modeling the $LM$ relation, and find that the $LM$ relation is significantly different than the relation modelled when not account for selection effects. We find that the luminosity of our clusters is 2.2$\pm$0.4 times higher (when accounting for selection effects) than the average for a given mass, its mass is 30% lower than the population average for a given luminosity. Equivalently, using the $LM$ relation measured from this sample without correcting for selection biases would lead to the underestimation by 40% of the average mass of a cluster with a given luminosity. Comparing the hydrostatic masses to mass estimates determined from the $Y_{X}$ parameter, we find that they are entirely consistent, irrespective of the dynamical state of the cluster.
影响因子：
6.5
作者：
Joana S. Santos;P. Tozzi;P. Rosati;H. Boehringer
通讯作者：
Joana S. Santos;P. Tozzi;P. Rosati;H. Boehringer
影响因子：
8.7
作者：
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者：
Wright, E. L.
星系团中的 LXâTvir 关系：辐射冷却和 AGN 加热的影响
影响因子：
6.5
作者：
Mittal;Reiprich;Jaritz
通讯作者：
Jaritz