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Supersolar metallicity in weak MgII absorption systems at z similar to 1.7
http://hdl.handle.net/10091/10123
http://hdl.handle.net/10091/10123d7101849-ebf9-4125-96bc-28e056112435
| 名前 / ファイル | ライセンス | アクション |
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ApJ_679_220.pdf (960.1 kB)
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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 | ||||||||||||
| タイトル | Supersolar metallicity in weak MgII absorption systems at z similar to 1.7 | |||||||||||
| 言語 | ||||||||||||
| 言語 | eng | |||||||||||
| DOI | ||||||||||||
| 関連識別子 | https://doi.org/10.1086/586691 | |||||||||||
| 関連名称 | 10.1086/586691 | |||||||||||
| キーワード | ||||||||||||
| 主題 | galaxies : abundances, intergalactic medium, quasars : absorption lines, quasars : individual (HE 0141-3932, HE 0429-4901, HE 2243-6031) | |||||||||||
| 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
× Charlton, JC
× Narayanan, A
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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 | The Astrophysical Journal. 679:220-238 (2008) | |||||||||||
| 書誌情報 |
The Astrophysical Journal 巻 679, 号 1, p. 220-238, 発行日 2008-05-20 |
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| 抄録 | ||||||||||||
| 内容記述 | Through photoionization modeling, constraints on the physical conditions of three z similar to 1.7 single-cloud weak Mg II systems [W-r(2796) <= 0.3 angstrom] are derived. Constraints are provided by high-resolution R = 45,000, high-S/N spectra of the three quasars HE0141-3932, HE0429-4091, and HE2243-6031, which we have obtained from the ESO archive of VLT UVES. Results are as follows.(1) The single-cloud weak Mg II absorption in the three z similar to 1.7 systems is produced by clouds with ionization parameters of -3.8 < log U less than or similar to -2.0 and sizes of 1-100 pc. (2) In addition to the low-ionization phase Mg II clouds, all systems need an additional one to three high-ionization phase C IV clouds within 100 km s(-1) of the Mg II component. The ionization parameters of the C IV clouds range from -1.9 < log U < -1.0, with sizes of tens of parsecs to kiloparsecs. (3) Two of the three single-cloud weak Mg II absorbers have near-solar or supersolar metallicities, if we assume a solar abundance pattern. Although such large metallicities have been found for z < 1 weak Mg II absorbers, these are the first high metallicities derived for such systems at higher redshifts. (4) Two of the three weak Mg II systems also need additional low-metallicity, broad Ly alpha absorption lines, offset in velocity from the metal-line absorption, in order to reproduce the full Ly alpha profile. (5) Metallicities in single-cloud weak Mg II systems are more than an order of magnitude larger than those in DLA systems at z similar to 1.7. In fact, there appears to be a gradual decrease in metallicity with increasing N-H (I), from these, the most metal-rich Ly alpha forest clouds, to Lyman limit systems, to sub-DLAs, and finally to the DLAs. | |||||||||||
| 資源タイプ（コンテンツの種類） | ||||||||||||
| 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 | ||||||||||||
| URL | http://gateway.isiknowledge.com/gateway/Gateway.cgi?&GWVersion=2&SrcAuth=ShinshuUniv&SrcApp=ShinshuUniv&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000255818600017 | |||||||||||
