Suzaku Observation of the Diffuse X-Ray Emission from the Open Cluster Westerlund 2: a Hypernova Remnant?

• 藤田, 裕

• 林田, 清

• 高橋, 宏明

• 高原, 文郎

• Fujita, Yutaka

• Hayashida, Kiyoshi

• Takahashi, Hiroaki

• Takahara, Fumio

抄録

The 3rd Suzaku international Conference "Energetic Cosmos : from Suzaku to ASTRO-H" (June 29-July 2, 2009. Grand Park Otaru Hotel), Otaru, Hokkaido Japan

We present the analysis of Suzaku observations of the young open cluster Westerlund 2, which is filled with diffuse X-ray emission. We found that the emission consists of three thermal components or two thermal and one non-thermal components. The upper limit of the energy flux of the non-thermal component is smaller than that in the TeV band observed with H.E.S.S. This may indicate that active particle acceleration has stopped in this cluster, and that the accelerated electrons have already cooled. The gamma-ray emission observed with H.E.S.S. is likely to come from high-energy protons, which hardly cool in contrast with electrons. Metal abundances of the diffuse X-ray gas may indicate the explosion of a massive star in the past. The details of this study are presented in Fujita et al. (2009a).

Meeting sponsors: The University of Tokyo, The Institute of Physical and Chemical Research, The Japan Society for the Promotion of Science

資料番号: AA0064574016

レポート番号: JAXA-SP-09-008E

収録刊行物

• 宇宙航空研究開発機構特別資料: = JAXA Special Publication: The Energetic Cosmos; from Suzaku to ASTRO-H

  宇宙航空研究開発機構特別資料: = JAXA Special Publication: The Energetic Cosmos; from Suzaku to ASTRO-H JAXA-SP-09-008E 44-45, 2010-02-26

  宇宙航空研究開発機構

キーワード

• stars: winds, outflows - ISM: cosmic rays - ISM: individual (RCW 49) - ISM: supernova remnants - Galaxy: open clusters and associations: individual (Westerlund 2)

詳細情報

• CRID: 1050011086242039168
• NII論文ID: 120006828418
• NII書誌ID: AA11984031
• ISSN: 1349113X
• Web Site: http://id.nii.ac.jp/1696/00004942/
• 本文言語コード: en
• 資料種別: conference paper
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