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Non-Thermal and Thermal Hard X-ray Emission from Clusters of Galaxies
https://jaxa.repo.nii.ac.jp/records/4959
https://jaxa.repo.nii.ac.jp/records/4959365dd2ad-371b-4422-8f67-ec6bf4e36277
名前 / ファイル | ライセンス | アクション |
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64574027.pdf (311.2 kB)
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Item type | 会議発表論文 / Conference Paper(1) | |||||
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公開日 | 2015-03-26 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Non-Thermal and Thermal Hard X-ray Emission from Clusters of Galaxies | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | galaxies: clusters: general - galaxies: clusters: individual (Coma, Abell 3667) - intergalactic medium - radio continuum: general - shock waves - X-rays: galaxies: clusters | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_5794 | |||||
資源タイプ | conference paper | |||||
著者 |
中澤, 知洋
× 中澤, 知洋× 深沢, 泰司× 井上, 進× 川原田, 円× 滝沢, 元和× Sarazin, Craig L.× Wik, Daniel R.× Nakazawa, Kazuhiro× Finoguenov, Alexis× Clarke, Tracy E.× Fukazawa, Yasushi× Inoue, Susumu× Kawaharada, Madoka× Takizawa, Motokazu |
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著者所属 | ||||||
東京大学理学系研究科物理学専攻 | ||||||
著者所属 | ||||||
広島大学 | ||||||
著者所属 | ||||||
京都大学 | ||||||
著者所属 | ||||||
理化学研究所 | ||||||
著者所属 | ||||||
山形大学 | ||||||
著者所属(英) | ||||||
en | ||||||
Department of Astronomy, University of Virginia | ||||||
著者所属(英) | ||||||
en | ||||||
Department of Astronomy, University of Virginia | ||||||
著者所属(英) | ||||||
en | ||||||
Department of Physics, University of Tokyo | ||||||
著者所属(英) | ||||||
en | ||||||
MPE, Garching, Germany, and UMBC | ||||||
著者所属(英) | ||||||
en | ||||||
NRL and Interferometrics | ||||||
著者所属(英) | ||||||
en | ||||||
Hiroshima University | ||||||
著者所属(英) | ||||||
en | ||||||
Department of Physics, Kyoto University | ||||||
著者所属(英) | ||||||
en | ||||||
RIKEN | ||||||
著者所属(英) | ||||||
en | ||||||
Yamagata University | ||||||
出版者 | ||||||
出版者 | 宇宙航空研究開発機構 | |||||
出版者(英) | ||||||
出版者 | Japan Aerospace Exploration Agency (JAXA) | |||||
書誌情報 |
宇宙航空研究開発機構特別資料: en : JAXA Special Publication: The Energetic Cosmos; from Suzaku to ASTRO-H 巻 JAXA-SP-09-008E, p. 78-81, 発行日 2010-02-26 |
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会議概要(会議名, 開催地, 会期, 主催者等)(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | 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) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Some recent Suzaku and XMM-Newton results on the thermal and non-thermal hard X-ray emission from clusters of galaxies are presented. The Coma cluster has the brightest cluster radio halo in the sky. We do not find significant evidence for non-thermal inverse Compton hard X-ray emission in Coma.Instead, we find that the Suzaku and XMM-Newton spectra are best explained by hot thermal gas in the cluster. Our upper limit on the non-thermal hard X-ray emission in Coma is well below the previous claimed detections with RXTE and BeppoSAX. However, since the field of view of the Suzaku HXD PIN detector is smaller than that of RXTE and BeppoSAX (although still bigger than the angular size of the radio halo), our upper limit and the previous detections might be consistent if the non-thermal emission comes from a very extended region which is much larger than the radio halo. Abell 3667 is a merging cluster with two cluster radio relics. The northwest radio relic is the brightest diffuse cluster radio source in the sky (brightest halo or relic). Our Suzaku observations show evidence for a very hot thermal component (kT > 13 keV) in the center of this cluster. This emission may be associated with merger shocks. The Suzaku spectra do not show clear evidence for non-thermal inverse Compton hard X-ray emission from the NW radio relic. We recently obtained a deep XMM observation of the region of the NW radio relic. The XMM image shows a surface brightness discontinuity at the outer edge of the radio relic. The image and spectra of this region are consistent with the jump being a merger shock with a Mach number of about 2. Alternatively, the X-ray emission in this region might be non-thermal emission from the radio relic. Our Suzaku and XMM observations imply that the magnetic field in the relic is B > or approximately 3 micro G, which is a surprisingly large field at such a large distance (about 2.2 Mpc) from the center of a cluster. This indicates that there is a nontrivial contribution of non-thermal pressure in this region. | |||||
内容記述(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Meeting sponsors: The University of Tokyo, The Institute of Physical and Chemical Research, The Japan Society for the Promotion of Science | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1349-113X | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11984031 | |||||
資料番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 資料番号: AA0064574027 | |||||
レポート番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | レポート番号: JAXA-SP-09-008E |