A new method to estimate cosmological parameters using the baryon fraction of clusters of galaxies

被引：137

作者：

Sasaki, S

机构：

[1] Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-03

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 1996年 / 48卷 / 06期

关键词：

cosmology; galaxies; clusters of; X-rays;

D O I：

10.1093/pasj/48.6.L119

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We propose a new method to estimate cosmological parameters using the baryon fraction of clusters of galaxies for a range of redshifts. The basic assumption is that the baryon fraction of clusters is constant, which is a reasonable assumption when it is averaged within a Mpc scale. We find that the baryon fraction vs. redshift diagram can estimate the cosmological parameters, since the derived value of the baryon fraction from observations depends on the adopted value of the cosmological parameters. We also discuss some points in comparing theoretical calculations with observations.

引用

页码：L119 / L122

页数：4

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