| アイテムタイプ |
default_学術雑誌論文 / Journal Article(1) |
| タイトル |
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タイトル |
Spectral study of the Galactic ridge X-ray emission with Suzaku: Comparison of the spectral shape with point sources |
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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 |
Galaxy |
| 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 |
diskX-rays |
| 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 |
diffuse backgroundX-rays |
| 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 |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| アクセス権 |
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アクセス権 |
metadata only access |
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アクセス権URI |
http://purl.org/coar/access_right/c_14cb |
| 著者 |
Yamamoto Kumiko
山内 茂雄
信川 正順
信川 久実子
内山 秀樹
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
The Galactic ridge X-ray emission (GRXE) is unresolved X-ray emission located on the Galactic plane, and whether the GRXE comes from truly diffuse plasma or unresolved point sources is still debatable. We present results of spectral analysis of the GRXE with Suzaku. In order to examine the point source origin, we fitted the GRXE spectra in the 1.2–10 keV energy band with a point source model, which is a mixture of active binary stars (ABs) and non-magnetic cataclysmic variables (non-mCVs), and found that the model cannot represent the GRXE spectral shape as long as the standard metal abundances of these species are assumed. In particular, the standard abundance model cannot account for the observed intensities of Si, S, and Ar lines as well as the previously reported Fe line. Assuming spatial densities in the solar neighborhood, integration of the ABs and non-mCVs accounts for only 30% of the observed GRXE flux. Other species of the point sources or diffuse emission with stronger Si, S, Ar, and Fe emission lines shall explain the rest. |
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言語 |
en |
| 書誌情報 |
en : Publications of the Astronomical Society of Japan
巻 75,
号 3,
p. 522-528,
発行日 2023
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| 出版者 |
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出版者 |
日本天文学会 |
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言語 |
ja |
| ISSN |
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収録物識別子タイプ |
EISSN |
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収録物識別子 |
2053-051X |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.1093/pasj/psad016 |
| 権利 |
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権利情報 |
© The Author(s) |
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言語 |
en |
https://doi.org/10.1093/pasj/psad016
