Department of Physics, Tokyo University of Science
Department of Physics, Tokyo University of Science
Department of Physics, Tokyo University of Science
Department of Physics, Tokyo University of Science
Department of Physics, University of Tokyo
Department of Astronomy, University of Virginia
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
102 - 103
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）
We studied temperature structure of the intracluster medium, possible bulk motions, and Fe and Ni nucleosynthesis in the Coma cluster with Suzaku. The temperatures derived from observed ratios of H-like and He-like Fe Kalpha lines agree well with those from spectral fitting with the single-temperature APEC model in the 1.0 - 8.0 keV and 5.0 - 8.0 keV bands. Since the line ratio is a strong function on plasma temperature, the observed consistency indicates that single-temperature component dominates the spectrum from each cell region. The observed values of central energy of the He-like Fe line are constant within 1000 km s(exp -1), which corresponds to a calibration error. Comparing with the sound velocity of the intracluster medium, 1500 km s(exp -1), we can verify the derived total mass in the cluster based on hydrostatic ICM equilibrium. These results on temperature and velocity structures suggest that the core of the Coma cluster reached in a fairly relaxed state after the recent merging. The observed Fe abundance of the intracluster medium is almost constant at 0.45 solar. Therefore, the gas should have been well mixed during mergings. The Ni/Fe ratio is found to be close to the solar ratio. In the nucleosynthesis of Ni and Fe, there is no obvious difference the cluster and the Galaxy.
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 observations of Kalpha lines of iron from intracluster medium of the Coma cluster
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