Item type |
学術雑誌論文 / Journal Article(1) |
公開日 |
2013-12-02 |
タイトル |
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タイトル |
HI gas in higher density regions of the intergalactic medium |
言語 |
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言語 |
eng |
DOI |
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関連識別子 |
https://doi.org/10.1086/425879 |
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関連名称 |
10.1086/425879 |
キーワード |
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主題 |
galaxies : ISM, intergalactic medium, quasars : absorption lines |
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, T
Tytler, D
Iye, M
Paschos, P
Norman, M
Kirkman, D
O'Meara, J
Suzuki, N
Kashikawa, N
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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, T |
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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 |
UNIV CHICAGO PRESS |
引用 |
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内容記述 |
ASTRONOMICAL JOURNAL. 128(6):2954-2961 (2004) |
書誌情報 |
ASTRONOMICAL JOURNAL
巻 128,
号 6,
p. 2954-2961,
発行日 2004-12
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抄録 |
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内容記述 |
Using H I absorption alone, we attempt to separate H I absorption lines in quasar spectra into two categories: higher density lines (HDLs) and lower density lines (LDLs), and we discuss the difference in their physical properties. We deblend and fit all H I lines with Voigt profiles and make an unbiased sample of H I lines covering a wide column density range (12<log N-H I [cm(-2)]<19). To reduce the influence of line blending, we simultaneously fit several Lyman series lines. As a result of a two-point correlation analysis, we found that higher column density H I lines are clustering at Deltav<200 km s(-1), whereas lower ones cluster at &UDelta;v<100 km s(-1). We define HDLs as H I lines with 15<log N-H I<19 and all H I lines within 200 km s(-1) of a line with log N-H I>15 and LDLs as all others with 12<log N-H I<15. We found that the HDLs have smaller minimum b-values for a given column density than the LDLs. This difference is successfully reproduced by our hydrodynamic simulation. The LDLs seem to be cool or shock-heated diffuse intergalactic medium gas, whereas the HDLs are likely to be cooler dense gas near to galaxies. |
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 |
0004-6256 |
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 |
AA00552749 |
権利 |
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権利情報 |
Copyright© 2004 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=000225417500029 |