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Suzaku view of X-ray Spectral Variability of the Radio Galaxy Centaurus A : Partial Covering Absorber, Reflector, and Possible Jet Component

https://hiroshima.repo.nii.ac.jp/records/2008894
https://hiroshima.repo.nii.ac.jp/records/2008894
6f52f3ad-fc04-4774-a32f-c97c20355fc8
名前 / ファイル ライセンス アクション
AstrophysJ_743_124.pdf AstrophysJ_743_124.pdf (1.3 MB)
Item type デフォルトアイテムタイプ_(フル)(1)
公開日 2023-03-18
タイトル
タイトル Suzaku view of X-ray Spectral Variability of the Radio Galaxy Centaurus A : Partial Covering Absorber, Reflector, and Possible Jet Component
言語 en
作成者 Fukazawa, Yasushi

× Fukazawa, Yasushi

en Fukazawa, Yasushi

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Hiragi, Kazuyoshi

× Hiragi, Kazuyoshi

en Hiragi, Kazuyoshi

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Yamazaki, Syoko

× Yamazaki, Syoko

en Yamazaki, Syoko

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Mizuno, Motohiro

× Mizuno, Motohiro

en Mizuno, Motohiro

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Hayashi, Kazuma

× Hayashi, Kazuma

en Hayashi, Kazuma

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Hayashi, Katsuhiro

× Hayashi, Katsuhiro

en Hayashi, Katsuhiro

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Nishino, Sho

× Nishino, Sho

en Nishino, Sho

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Takahashi, Hiromitsu

× Takahashi, Hiromitsu

en Takahashi, Hiromitsu

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Ohno, Masanori

× Ohno, Masanori

en Ohno, Masanori

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アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利情報
権利情報 (c) 2011. The American Astronomical Society. All rights reserved.
主題
主題Scheme Other
主題 galaxies: active
主題
主題Scheme Other
主題 galaxies: individual (Centaurus A)
主題
主題Scheme Other
主題 galaxies: Seyfert
主題
主題Scheme Other
主題 X-rays: galaxies
主題
主題Scheme NDC
主題 440
内容記述
内容記述 We observed a nearby radio galaxy, Centaurus A (Cen A), three times with Suzaku in 2009 and measured the wide-band X-ray spectral variability more accurately than previous measurements. The Cen A was in an active phase in 2009, and the flux became higher by a factor of 1.5-2.0 and the spectrum became harder than that in 2005. The Fe-K line intensity increased by 20%-30% from 2005 to 2009. The correlation of the count rate between the XIS 3-8 keV and PIN 15-40 keV band showed a complex behavior with a deviation from a linear relation. The wide-band X-ray continuum in 2-200 keV can be fitted with an absorbed power-law model plus a reflection component, or a power law with a partial covering Compton-thick absorption. The difference spectra between high and low flux periods in each observation were reproduced by a power law with a partial covering Compton-thick absorption. Such a Compton-thick partial covering absorber was observed for the first time in Cen A. The power-law photon index of the difference spectra in 2009 is almost the same as that of the time-averaged spectra in 2005, but steeper by similar to 0.2 than that of the time-averaged spectra in 2009. This suggests an additional hard power-law component with a photon index of <1.6 in 2009. This hard component could be a lower part of the inverse-Compton-scattered component from the jet, whose gamma-ray emission has recently been detected with the Fermi Large Area Telescope.
言語 en
出版者
出版者 IOP Publishing Ltd
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ journal article
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
関連情報
識別子タイプ DOI
関連識別子 10.1088/0004-637X/743/2/124
関連情報
識別子タイプ DOI
関連識別子 http://dx.doi.org/10.1088/0004-637X/743/2/124
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 0004-637X
収録物識別子
収録物識別子タイプ NCID
収録物識別子 AA00553242
開始ページ
開始ページ 124
書誌情報 The Astrophysical Journal
The Astrophysical Journal

巻 743, 号 2, p. 124, 発行日 2011
旧ID 34772
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