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Our sample consists of three intrinsic NAL quasars and one \u0027\u0027 mini- BAL\u0027\u0027 quasar, plus four quasars without intrinsic absorption lines for comparison. These were drawn in a systematic manner from an optical / UV- selected sample. The X- ray properties of intrinsic NAL quasars are indistinguishable from those of \u0027\u0027normal\u0027\u0027 quasars. We do not find any excess absorption in quasars with intrinsic NALs, with upper limits of NH less than or similar to few x 10(22) cm(-2). We compare the X- ray and UV properties of our sample quasars by plotting the equivalent width and blueshift velocity of the intrinsic NALs and the X- ray spectral index against the `` optical - to - X- ray\u0027\u0027 slope, alpha(ox). When BAL quasars and other AGNs with intrinsic NALs are included, the plots suggest that intrinsic NAL quasars form an extension of the BAL sequences and tend to bridge the gap between BAL and normal quasars. 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Exploratory study of the X-ray properties of quasars with intrinsic narrow absorption lines
http://hdl.handle.net/10091/10122
http://hdl.handle.net/10091/10122b0bb1226-d855-4a95-817b-127eefea2026
名前 / ファイル | ライセンス | アクション |
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2010-06-04 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Exploratory study of the X-ray properties of quasars with intrinsic narrow absorption lines | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | galaxies : active | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | galaxies : nuclei | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | quasars : absorption lines | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | X-rays : galaxies | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
Misawa, T
× Misawa, T× Eracleous, M× Chartas, G× Charlton, JC |
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信州大学研究者総覧へのリンク | ||||||
氏名 | Misawa, T | |||||
URL | http://soar-rd.shinshu-u.ac.jp/profile/ja.ypchuUkV.html | |||||
出版者 | ||||||
出版者 | The American Astronomical Society | |||||
引用 | ||||||
内容記述タイプ | Other | |||||
内容記述 | The Astrophysical Journal. 677:863-879 (2008) | |||||
書誌情報 |
The Astrophysical Journal 巻 677, 号 2, p. 863-879, 発行日 2008-04-20 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We have used archival Chandra and XMM- Newton observations of quasars hosting intrinsic narrow UV absorption lines (intrinsic NALs) to carry out an exploratory survey of their X- ray properties. Our sample consists of three intrinsic NAL quasars and one '' mini- BAL'' quasar, plus four quasars without intrinsic absorption lines for comparison. These were drawn in a systematic manner from an optical / UV- selected sample. The X- ray properties of intrinsic NAL quasars are indistinguishable from those of ''normal'' quasars. We do not find any excess absorption in quasars with intrinsic NALs, with upper limits of NH less than or similar to few x 10(22) cm(-2). We compare the X- ray and UV properties of our sample quasars by plotting the equivalent width and blueshift velocity of the intrinsic NALs and the X- ray spectral index against the `` optical - to - X- ray'' slope, alpha(ox). When BAL quasars and other AGNs with intrinsic NALs are included, the plots suggest that intrinsic NAL quasars form an extension of the BAL sequences and tend to bridge the gap between BAL and normal quasars. Observations of larger samples of intrinsic NAL quasars are needed to verify these conclusions. We also test two competing scenarios for the location of the NAL gas in an accretion disk wind. Our results strongly support a location of the NAL gas at high latitudes above the disk, closer to the disk axis than the dense BAL wind. We detect excess X- ray absorption only in Q0014+ 8118, which does not host intrinsic NALs. The absorbing medium very likely corresponds to an intervening system at z = 1.1, which also produces strong absorption lines in the rest- frame UV spectrum of this quasar. In an appendix we discuss the connection between UV and X- ray attenuation and its effect on alpha(ox). | |||||
資源タイプ(コンテンツの種類) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Article | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0004-637X | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00553253 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1086/529426 | |||||
関連名称 | 10.1086/529426 | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
WoS | ||||||
表示名 | Web of Science | |||||
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