Item type |
学術雑誌論文 / Journal Article(1) |
公開日 |
2010-10-19 |
タイトル |
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タイトル |
A SPECTROPOLARIMETRIC TEST OF THE STRUCTURE OF THE INTRINSIC ABSORBERS IN THE QUASAR HS 1603+3820* |
言語 |
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言語 |
eng |
DOI |
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関連識別子 |
https://doi.org/10.1088/0004-637X/719/2/1890 |
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関連名称 |
10.1088/0004-637X/719/2/1890 |
キーワード |
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主題 |
quasars: absorption lines, quasars: individual (HS 1603+3820) |
資源タイプ |
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資源 |
http://purl.org/coar/resource_type/c_6501 |
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タイプ |
journal article |
著者 |
Misawa, Toru
Kawabata, Koji S.
Eracleous, Michael
Charlton, Jane C.
Kashikawa, Nobunari
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信州大学研究者総覧へのリンク |
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氏名 |
Misawa, Toru |
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URL |
http://soar-rd.shinshu-u.ac.jp/profile/ja.ypchuUkV.html |
出版者 |
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出版者 |
IOP PUBLISHING LTD |
引用 |
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内容記述 |
The Astrophysical Journal. 719(2):1890-1895 (2010) |
書誌情報 |
The Astrophysical Journal
巻 719,
号 2,
p. 1890-1895,
発行日 2010-08-20
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抄録 |
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内容記述 |
We report the results of a spectropolarimetric observation of the C VI "mini-broad" absorption line (mini-BAL) in the quasar HS 1603+3820 (z(em) = 2.542). The observations were carried out with the FOCAS instrument on the Subaru Telescope and yielded an extremely high polarization sensitivity of delta(p) similar to 0.1%, at a resolving power of R similar to 1500. HS 1603+3820 has been the target of a high-resolution spectroscopic monitoring campaign for more than four years, aimed at studying its highly variable C VI mini-BAL profile. Using the monitoring observations in an earlier paper, we were able to narrow down the causes of the variability to the following two scenarios: (1) scattering material of variable optical depth redirecting photons around the absorber and (2) a variable, highly ionized screen between the continuum source and the absorber which modulates the UV continuum incident on the absorber. The observations presented here provide a crucial test of the scattering scenario and lead us to disfavor it because (1) the polarization level is very small (p similar to 0.6%) throughout the spectrum and (2) the polarization level does not increase across the mini-BAL trough. Thus, the variable screen scenario emerges as our favored explanation of the C VI mini-BAL variability. Our conclusion is bolstered by recent X-ray observations of nearby mini-BAL quasars, which show a rapidly variable soft X-ray continuum that appears to be the result of transmission through an ionized absorber of variable ionization parameter and optical depth. |
資源タイプ(コンテンツの種類) |
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内容記述 |
Article |
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 |
0004-637X |
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 |
AA00553253 |
権利 |
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権利情報 |
Copyright (c) 2010 The American Astronomical Society |
出版タイプ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
WoS |
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URL |
http://gateway.isiknowledge.com/gateway/Gateway.cgi?&GWVersion=2&SrcAuth=ShinshuUniv&SrcApp=ShinshuUniv&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000280658000068 |