IS THE TAURUS B213 REGION A TRUE FILAMENT?: OBSERVATIONS OF MULTIPLE CYANOACETYLENE TRANSITIONS
文献类型：期刊论文
| 作者 | Li, Di1,2,3 ; Goldsmith, Paul F.3
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2012-09-01 |
| 卷号 | 756期号:1 |
| 关键词 | ISM: individual objects (Taurus) ISM: molecules ISM: structure techniques: spectroscopic |
| 英文摘要 | We have obtained spectra of the J = 2-1 and 10-9 transitions of cyanoacetylene (HC3N) toward a collection of positions in the most prominent filament, B213, in the Taurus molecular cloud. The analysis of the excitation conditions of these transitions reveals an average gas H-2 volume density of (1.8 +/- 0.7) x10(4) cm(-3). Based on column density derived from the Two Micron All Sky Survey and this volume density, the line-of-sight dimension of the high-density portion of B213 is found to be similar or equal to 0.12 pc, which is comparable to the smaller projected dimension and much smaller than the elongated dimension of B213 (similar to 2.4 pc). B213 is thus likely a true cylinder-like filament rather than a sheet seen edge-on. The line width and velocity gradient seen in HC3N are also consistent with Taurus B213 being a self-gravitating filament in the early stage of either fragmentation and/or collapse. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000309044300012 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6148]  |
| 专题 | 国家天文台_射电天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Space Sci Inst, Boulder, CO USA 3.CALTECH, Jet Prop Lab, Pasadena, CA USA |
| 推荐引用方式 GB/T 7714 | Li, Di,Goldsmith, Paul F.. IS THE TAURUS B213 REGION A TRUE FILAMENT?: OBSERVATIONS OF MULTIPLE CYANOACETYLENE TRANSITIONS[J]. ASTROPHYSICAL JOURNAL,2012,756(1). |
| APA | Li, Di,&Goldsmith, Paul F..(2012).IS THE TAURUS B213 REGION A TRUE FILAMENT?: OBSERVATIONS OF MULTIPLE CYANOACETYLENE TRANSITIONS.ASTROPHYSICAL JOURNAL,756(1). |
| MLA | Li, Di,et al."IS THE TAURUS B213 REGION A TRUE FILAMENT?: OBSERVATIONS OF MULTIPLE CYANOACETYLENE TRANSITIONS".ASTROPHYSICAL JOURNAL 756.1(2012). |
入库方式： OAI收割
来源：国家天文台
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