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Chemical Timescale of Dark Cloud Cores Estimated from Deuterium Fractionation
http://hdl.handle.net/10098/1586
http://hdl.handle.net/10098/158632000cfe-5f7d-4938-a963-432c3ecab76e
名前 / ファイル | ライセンス | アクション |
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Astrophysical_Journal_______________________2002_-_569_-_2_-_Part_1_-_836.pdf (1.1 MB)
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〓 2002 The American Astronomical Society
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2008-02-13 | |||||
タイトル | ||||||
タイトル | Chemical Timescale of Dark Cloud Cores Estimated from Deuterium Fractionation | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | astrochemistry—ISM | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | abundances—ISM | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | clouds—ISM | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | molecules | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_1843 | |||||
資源タイプ | other | |||||
著者 |
SAITO, Shuji
× SAITO, Shuji× AIKAWA, Yuri× HERBST, Eric× OHISHI, Masatoshi× HIROTA, Tomoya× YAMAMOTO, Satoshi× KAIFU, Norio |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The chemical evolutionary age of dark cloud cores is estimated from the degree of deuterium fractionation, on the assumption that the chemical model used is reasonable. The method is applied to dark cloud cores along the TMC-1 ridge, using the abundance ratios between DCO+ and H13CO+ combined with the new standard model network of gas-phase chemical reactions. The difference in deuterium fractionation between the ammonia peak and the cyanopolyyne peak, though its error transferred from the observed data is relatively large, is explained by a time difference in the evolutionary age of more than 105 yr, or by a small change in the depletion factor of carbon and oxygen, which also indicates the degree of core evolution. The method of determining the evolutionary age of dark cloud cores is somewhat free from the details of chemical reaction not directly related to deuterium fractionation. The present result is compared with those from other methods. | |||||
書誌情報 |
Astrophysical Journal 巻 569, p. 836-840, 発行日 2002-04 |
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出版者 | ||||||
出版者 | University of Chicago Press | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0004637X | |||||
書誌レコードID | ||||||
識別子タイプ | NCID | |||||
関連識別子 | TD00007833 | |||||
著者版フラグ | ||||||
出版タイプ | AO | |||||
出版タイプResource | http://purl.org/coar/version/c_b1a7d7d4d402bcce |