Einstein Observatory evidence for the widespread baryon overdensity in clusters of galaxies
Einstein Observatory evidence for the widespread baryon overdensity in clusters of galaxies
复制标题
爱因斯坦天文台证明星系团中普遍存在重子密度过高的证据
DOI:
10.1093/mnras/273.1.72
复制
发表时间:
1995
影响因子:
4.8
通讯作者:
A. Fabian
中科院分区:
文献类型:
--
作者:
D. White;A. Fabian
We have analysed the X-ray surface brightness profiles of 19 luminous clusters of galaxies observed with the EINSTEIN Observatory. Our aim is to determine cluster gas masses out to radii between 1 and 3Mpc. S. White and Frenk used observations of the Coma cluster to show that the fraction of mass in gas exceeds that expected from predictions of the mean baryon fraction of the universe. We show here that the problem is common in clusters, and briefly discuss the implications.