Item type |
会議発表論文 / Conference Paper(1) |
公開日 |
2015-03-26 |
タイトル |
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タイトル |
Discovery of strong radiative recombination continua from IC443 |
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言語 |
en |
言語 |
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言語 |
eng |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
ISM: supernova remnants - radiation mechanisms: thermal |
資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_5794 |
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資源タイプ |
conference paper |
著者 |
山口, 弘悦
小澤, 碧
小山, 勝二
平賀, 純子
尾崎, 正伸
米徳, 大輔
Yamaguchi, Hiroya
Ozawa, Midori
Koyama, Katsuji
Hiraga, Junko S.
Ozaki, Masanobu
Yonetoku, Daisuke
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著者所属 |
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理化学研究所 |
著者所属 |
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京都大学大学院理学研究科物理学専攻 |
著者所属 |
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京都大学大学院理学研究科物理学専攻 |
著者所属 |
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理化学研究所 |
著者所属 |
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宇宙航空研究開発機構宇宙科学研究本部 |
著者所属 |
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金沢大学理学部物理学科 |
著者所属(英) |
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en |
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RIKEN |
著者所属(英) |
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en |
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Department of Physics, Kyoto University |
著者所属(英) |
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en |
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Department of Physics, Kyoto University |
著者所属(英) |
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en |
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RIKEN |
著者所属(英) |
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en |
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Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS)(JAXA) |
著者所属(英) |
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en |
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Department of Physics, Kanazawa University |
出版者 |
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出版者 |
宇宙航空研究開発機構 |
出版者(英) |
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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. 66-69,
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) |
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内容記述タイプ |
Other |
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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) |
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内容記述タイプ |
Other |
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内容記述 |
We present the Suzaku detection of strong free-bound emission from the Galactic middle-aged supernova remnant (SNR) IC 443. A previous ASCA observation revealed that the Lyalfpha fluxes of Si and S are significantly higher than those expected from the electron temperature of the bremsstrahlung continuum (Kawasaki et al. 2002). Therefore, it was claimed that the thermal plasma in this SNR is in "overionization". In the XIS spectrum of IC 443, we discovered hump-like features around at 2.7 and 3.5 keV as well as the strong Lyalpha lines. These humps are well represented by radiative recombination continua (RRC) of H-like Si and S with the electron temperature of approximately 0.6 keV. The ionization temperatures of Si and S determined from the intensity ratios of the RRC to He-like Kalpha line are approximately 1.0 keV and approximately 1.2 keV, respectively. We thus find firm evidence for an extremely-overionized (recombining) plasma. As the origin of the overionization, a thermal conduction scenario argued in the previous work is not favored in our new results. We propose that the highly-ionized gas were made at the initial phase of the SNR evolution in dense regions around a massive progenitor, and the low electron temperature is due to a rapid cooling by an adiabatic expansion. |
内容記述(英) |
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内容記述タイプ |
Other |
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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 |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
1349-113X |
書誌レコードID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA11984031 |
資料番号 |
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内容記述タイプ |
Other |
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内容記述 |
資料番号: AA0064574024 |
レポート番号 |
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内容記述タイプ |
Other |
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内容記述 |
レポート番号: JAXA-SP-09-008E |