School of Science and Engineering, Yamagata University
Department of Physics, Yamagata University
Department of Physics, The University of Tokyo
Institute of Astronomy and Astrophysics, Academia Sinica
Institute of Physics and Chemical Research(RIKEN)
National Astronomical Observatory of Japan
National Astronomical Observatory of Japan
出版者
宇宙航空研究開発機構
出版者（英）
Japan Aerospace Exploration Agency (JAXA)
雑誌名
宇宙航空研究開発機構特別資料:
雑誌名(英)
JAXA Special Publication: The Energetic Cosmos; from Suzaku to ASTRO-H
巻
JAXA-SP-09-008E
ページ
378 - 379
発行年
2010-02-26
会議概要（会議名, 開催地, 会期, 主催者等）（英）
The 3rd Suzaku international Conference "Energetic Cosmos : from Suzaku to ASTRO-H" (June 29-July 2, 2009. Grand Park Otaru Hotel), Otaru, Hokkaido Japan
抄録（英）
Around ZwCl0823.2+0425, several dark matter halos are found via the Local Cluster Substructure Survey (LoCuSS), which suggests that those halos constitute large-scale structure filaments. We observed a region around the cluster ZwCl0823.2+0425 (z = 0.2248) with Suzaku. ZwCl0823.2+0425 itself and the halo in the north of it are clearly bright in X-ray. According to the SDSS spectroscopic data, the north and northeast halos are at the redshift of z = 0.472, and the northwest one is at that of z = 0.2248. Therefore, it is clear that two large-scale filaments overlap in this region. In the northeast halo area, where the lensing signal is relatively weak, very faint X-ray excess is detected. On the other hand, in the northwest and southeast small halo area, which have the stronger weak lensing signal than the northeast halo area, little X-ray excess is detected. Such a diversity of X-ray properties suggests a variety of the concentration degree of baryon and baryon fraction itself. We investigate L(sub x)-T and M-T relations for ZwCl0823.2+0425 and the other sub halos. The obtained L(sub x)-T relation does not agree with the former typical results, and the M-T relation is slightly deviated from the self-similar model (3.3sigma), though any systematic errors of the background are not considered at present.
内容記述（英）
Meeting sponsors: The University of Tokyo, The Institute of Physical and Chemical Research, The Japan Society for the Promotion of Science
Suzaku Observation of Large Scale Structure Filaments around ZwCl0823.2+0425 Found through the Local Cluster Substructure Survey
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