1E 0657-56: A contender for the hottest known cluster of galaxies

被引：97

作者：

Tucker, W

Blanco, P

Rappoport, S

David, L

Fabricant, D

Falco, EE

Forman, W

Dressler, A

Ramella, M

机构：

[1] Univ Calif San Diego, Ctr Astrophys & Space Sci, La Jolla, CA 92093 USA

[2] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[3] Carnegie Inst Washington Observ, Pasadena, CA 91101 USA

[4] Osservatorio Astron Trieste, I-34131 Trieste, Italy

来源：

ASTROPHYSICAL JOURNAL | 1998年 / 496卷 / 01期

基金：

美国国家航空航天局;

关键词：

galaxies; clusters; individual; (1E; 0657-56); intergalactic medium large-scale structure of universe; X-rays;

D O I：

10.1086/311234

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We identify the extended Einstein LPC X-ray source 1E 0657-56 with a previously unknown cluster of galaxies at a redshift of z = 0.296. Optical CCD images show the presence of a gravitational are in this cluster, and galaxy spectra yield a cluster velocity dispersion of 1213(-191)(+352) km s(-1). X-ray data obtained with the ROSAT HRI and ASCA indicate that 1E 0657-56 is a highly luminous cluster in which a merger of subclusters may be occurring. The temperature of the hot gas in 1E 0657-56 is kT = 17.4 +/- 2.5 keV, which makes it an unusually hot cluster, with important cosmological implications.

引用

页码：L5 / L8

页数：4

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