Suzaku Observations of the Cluster of Galaxies Abell 2052

被引：8
|
作者：
Tamura, Takayuki [1 ]
Mitsuda, Kazuhisa [1 ]
Takei, Yoh [1 ,2 ]
Yamasaki, Noriko Y. [1 ]
Itoh, Akiharu [1 ]
Hayashida, Kiyoshi [3 ]
Henry, J. Patrick [4 ]
Kunieda, Hideyo [5 ]
Matsushita, Kyoko [6 ]
Ohashi, Takaya [7 ]
机构：
[1] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan
[2] SRON Netherlands Org Space Res, NL-3584 CA Utrecht, Netherlands
[3] Osaka Univ, Fac Sci, Dept Astrophys, Osaka 5600043, Japan
[4] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA
[5] Nagoya Univ, Dept Particle & Astrophys, Chikusa Ku, Nagoya, Aichi 4648602, Japan
[6] Tokyo Univ Sci, Dept Phys, Shinjuku Ku, Tokyo 1628601, Japan
[7] Tokyo Metropolitan Univ, Dept Phys, Tokyo 1920397, Japan
来源：
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2008年 / 60卷 / 04期
关键词：
cosmology: large-scale structure of universe; galaxies: clusters: individual (Abell 2052); galaxies: intergalactic medium; X-rays: diffuse background;
D O I：
10.1093/pasj/60.4.695
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The results from Suzaku X-ray Imaging Spectrometer (XIS) observations of relaxed cluster of galaxies, Abell 2052, are presented. Offset pointing data were used to estimate the Galactic foreground emission in the direction of the cluster. Significant soft X-ray excess emission above this foreground, the intracluster medium emission, and other background components was confirmed and resolved both radially and spectroscopically. This excess can be described either by (a) local variations of known Galactic emission components or by (b) an additional thermal component with a temperature of about 0.2 keV, possibly associated with the cluster. The radial temperature and metallicity profiles of the intracluster medium were measured within similar to 20' in radius (about 60% of the virial radius) from the cluster center. The temperature drops radially to 0.5-0.6 of the peak value at a radius of similar to 15'. The gas-mass-weighted metal abundance averaged over the observed region was found to be 0.21 +/- 0.05 times solar.
引用
收藏
页码：695 / 705
页数：11
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