Correlation between baryon mass and intergalactic gas temperature in nearby galaxy clusters

被引：8

作者：

Voevodkin, AA ^{[1
]}

Vikhlinin, AA ^{[1
]}

Pavlinsky, MN ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Space Res, Moscow 117810, Russia

来源：

ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS | 2002年 / 28卷 / 06期

基金：

俄罗斯基础研究基金会;

关键词：

galaxy clusters; cosmology; large-scale structure of Universe;

D O I：

10.1134/1.1484136

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We measured the correlation between baryon mass and intracluster gas temperature in nearby galaxy clusters selected from the ROSAT All-Sky Survey. The mass of the intracluster gas was determined directly from an analysis of X-ray images. A correlation was found between the gas mass and the mass of the cluster stellar matter, which was used to determine the total baryon mass (i.e., gas + stars). The mass was measured within the radii corresponding to overdensities of 324 and 500 relative to the mean baryon density inferred from the theory of primordial nucleosynthesis. The measured correlation between baryon mass and temperature is close to that predicted by a self-similar theory of cluster formation: M proportional to T-3/2. (C) 2002 MAIK "Nauka/Interperiodica".

引用

页码：366 / 372

页数：7

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