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Time-variable complex metal absorption lines in the quasar HS 1603+3820
http://hdl.handle.net/10091/10117
http://hdl.handle.net/10091/1011791753948-b2f1-4337-b7bc-f874f1cf7123
名前 / ファイル | ライセンス | アクション |
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ApJ_629_115.pdf (1.1 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2010-06-03 | |||||
タイトル | ||||||
タイトル | Time-variable complex metal absorption lines in the quasar HS 1603+3820 | |||||
言語 | en | |||||
言語 | ||||||
言語 | eng | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1086/431342 | |||||
関連名称 | 10.1086/431342 | |||||
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 | quasars : individual (HS 1603+3820) | |||||
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 | |||||
著者 |
Misawa, T
× Misawa, T× Eracleous, M× Charlton, JC× Tajitsu, A |
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信州大学研究者総覧へのリンク | ||||||
表示名 | 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. 629:115-130 (2005) | |||||
書誌情報 |
The Astrophysical Journal 巻 629, 号 1, p. 115-130, 発行日 2005-08-10 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We present a new spectrum of the quasar HS 1603+3820 taken 1.28 yr (0.36 yr in the quasar rest frame) after a previous observation with Subaru+HDS. The new spectrum enables us to search for time variability as an identifier of intrinsic narrow absorption lines (NALs). This quasar shows a rich complex of C IV NALs within 60,000 km s(-1) of the emission redshift. On the basis of covering factor analysis, Misawa et al. found that the C IV NAL system at z(abs) = 2.42-2.45 (system A, at a shift velocity of v(sh) = 8300-10,600 km s(-1) relative to the quasar) was intrinsic to the quasar. With our new spectrum, we perform time variability analysis, as well as covering factor analysis, to separate intrinsic NALs from intervening NALs for eight C IV systems. Only system A, which was identified as an intrinsic system in the earlier paper by Misawa et al., shows a strong variation in line strength (W-obs approximate to x 10(4) -> 19.1 angstrom). We speculate that a broad absorption line (BAL) could be forming in this quasar (i.e., many narrower lines will blend together to make a BAL profile). We illustrate the plausibility of this suggestion with the help of a simulation in which we vary the column densities and covering factors of the NAL complex. Under the assumption that a change of ionization state causes the variability, a lower limit can be placed on the electron density (n(e) greater than or similar to 3 x 10(4) cm(-3)) and an upper limit on the distance from the continuum source (r <= 6 kpc). On the other hand, if the motion of clumpy gas causes the variability (a more likely scenario), the crossing velocity and the distance from the continuum source are estimated to be v(cross) > 8000 km s(-) and r < 3 pc. In this case, the absorber does not intercept any flux from the broad emission line region, but only flux from the UV continuum source. If we adopt the dynamical model of Murray et al., we can obtain a much more strict constraint on the distance of the gas parcel from the continuum source, r < 0: 2 pc. | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0004-637X | |||||
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収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00553253 | |||||
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 | |||||
URL | http://gateway.isiknowledge.com/gateway/Gateway.cgi?&GWVersion=2&SrcAuth=ShinshuUniv&SrcApp=ShinshuUniv&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000230999600012 |