A Large-field J=1-0 Survey of CO and Its Isotopologues toward the Cassiopeia A Supernova Remnant
文献类型：期刊论文
| 作者 | Ma, Yuehui1,2,3; Wang, Hongchi1,2 ; Zhang, Miaomiao1,2,4; Li, Chong1,2,3; Yang, Ji1,2
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2019-06-10 |
| 卷号 | 878期号:1页码:18 |
| 关键词 | ISM: clouds ISM: individual objects (Cas A) ISM: supernova remnants stars: formation surveys |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ab1ea7 |
| 通讯作者 | Ma, Yuehui(mayh@pmo.ac.cn) |
| 英文摘要 | We have conducted a large-field simultaneous survey of (CO)-C-12, (CO)-C-13, and (CO)-O-18 J = 1 - 0 emission toward the Cassiopeia A (Cas A) supernova remnant (SNR), which covers a sky area of 3 degrees.5 x 3 degrees.1. The Cas giant molecular cloud (GMC) mainly consists of three individual clouds with masses on the order of 10(4)-10(5) M-circle dot. The total mass derived from the (CO)-C-13 emission of the GMC is 2.1 x 10(5) M-circle dot and is 9.5 x 10(5) M-circle dot from the (CO)-C-12 emission. Two regions with broadened (6-7 km s(-1)) or asymmetric (CO)-C-12 line profiles are found in the vicinity (within a 10' x 10' region) of the Cas A SNR, indicating possible interactions between the SNR and the GMC. Using the GAUSSCLUMPS algorithm, 547 (CO)-C-13 clumps are identified in the GMC, 54% of which are supercritical (i.e., alpha(vir) < 2). The mass spectrum of the molecular clumps follows a power-law distribution with an exponent of -2.20. The pixel-by-pixel column density of the GMC can be fitted with a log-normal probability distribution function (N-PDF). The median column density of molecular hydrogen in the GMC is 1.6 x 10 (21) cm(-2) and half the mass of the GMC is contained in regions with H-2 column density lower than 3 x 10(21) cm(-2), which is well below the threshold of star formation. The distribution of the YSO candidates in the region shows no agglomeration. |
| WOS关键词 | MASS-SIZE RELATION ; MOLECULAR CLOUDS ; STAR-FORMATION ; A SUPERNOVA ; DENSITY DISTRIBUTION ; GAS ; EVOLUTION ; DISCOVERY ; PROGENITOR ; DIRECTION |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000471316800007 |
| 出版者 | IOP PUBLISHING LTD |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/27549]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Ma, Yuehui |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China 2.Chinese Acad Sci, Key Lab Radio Astron, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China 3.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 4.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany |
| 推荐引用方式 GB/T 7714 | Ma, Yuehui,Wang, Hongchi,Zhang, Miaomiao,et al. A Large-field J=1-0 Survey of CO and Its Isotopologues toward the Cassiopeia A Supernova Remnant[J]. ASTROPHYSICAL JOURNAL,2019,878(1):18. |
| APA | Ma, Yuehui,Wang, Hongchi,Zhang, Miaomiao,Li, Chong,&Yang, Ji.(2019).A Large-field J=1-0 Survey of CO and Its Isotopologues toward the Cassiopeia A Supernova Remnant.ASTROPHYSICAL JOURNAL,878(1),18. |
| MLA | Ma, Yuehui,et al."A Large-field J=1-0 Survey of CO and Its Isotopologues toward the Cassiopeia A Supernova Remnant".ASTROPHYSICAL JOURNAL 878.1(2019):18. |
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来源：紫金山天文台
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