Molecular Gas Structures Traced by (CO)-C-13 Emission in the 18,190 (CO)-C-12 Molecular Clouds from the MWISP Survey
文献类型：期刊论文
| 作者 | Yuan, Lixia1,2; Yang, Ji1,2; Du, Fujun1,2; Su, Yang1,2; Liu, Xunchuan3; Zhang, Shaobo1,2; Sun, Yan1,2; Zhou, Xin1,2; Yan, Qing-Zeng1,2; Ma, Yuehui1,2 |
| 刊名 | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
 |
| 出版日期 | 2022-08-01 |
| 卷号 | 261期号:2页码:29 |
| ISSN号 | 0067-0049 |
| DOI | 10.3847/1538-4365/ac739f |
| 英文摘要 | After morphological classification of 18,190 (CO)-C-12 molecular clouds, we further investigate the properties of their internal molecular gas structures traced by the (CO)-C-13 (J = 1-0) line emissions. Using three different methods to extract the (CO)-C-13 gas structures within each (CO)-C-12 cloud, we find that similar to 15% of the (CO)-C-12 clouds (2851) have (CO)-C-13 gas structures and these (CO)-C-12 clouds contribute about 93% of the total integrated flux of (CO)-C-12 emission. In each of the 2851 (CO)-C-12 clouds with (CO)-C-13 gas structures, the (CO)-C-13 emission area generally does not exceed 70% of the (CO)-C-12 emission area, and the (CO)-C-13 integrated flux does not exceed 20% of the (CO)-C-12 integrated flux. We reveal a strong correlation between the velocity-integrated intensities of (CO)-C-12 lines and those of (CO)-C-13 lines in both (CO)-C-12 and (CO)-C-13 emission regions. This indicates the H-2 column densities of molecular clouds are crucial for the (CO)-C-13 line emission. After linking the (CO)-C-13 structure detection rates of the 18,190 (CO)-C-12 molecular clouds to their morphologies, i.e., nonfilaments and filaments, we find that the (CO)-C-13 gas structures are primarily detected in (CO)-C-12 clouds with filamentary morphologies. Moreover, these filaments tend to harbor more than one (CO)-C-13 structure. That demonstrates filaments not only have larger spatial scales, but also have more molecular gas structures traced by (CO)-C-13 lines, i.e., local gas density enhancements. Our results favor the turbulent compression scenario for filament formation, in which dynamical compression of turbulent flows induces local density enhancements. The nonfilaments tend to be in the low-pressure and quiescent turbulent environments of the diffuse interstellar medium. |
| WOS关键词 | STAR-FORMATION ; INTERSTELLAR-MEDIUM ; TURBULENT MODEL ; EVOLUTION ; FILAMENTS ; ASTROPY ; HINTS |
| 资助项目 | National Natural Science Foundation of China[12041305] ; National Key R&D Program of China[2017YFA0402701] ; CAS Key Research Program of Frontier Sciences[QYZDJ-SSW-SLH047] ; [12CO/13CO/C18O] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000836449200001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; CAS Key Research Program of Frontier Sciences ; CAS Key Research Program of Frontier Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; CAS Key Research Program of Frontier Sciences ; CAS Key Research Program of Frontier Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; CAS Key Research Program of Frontier Sciences ; CAS Key Research Program of Frontier Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; CAS Key Research Program of Frontier Sciences ; CAS Key Research Program of Frontier Sciences |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/87734]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Yuan, Lixia |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, 10 Yuanhua Rd, Nanjing 210033, Peoples R China 2.Chinese Acad Sci, Key Lab Radio Astron, 10 Yuanhua Rd, Nanjing 210033, Peoples R China 3.Chinese Acad Sci, Shanghai Astron Observ, Shanghai, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yuan, Lixia,Yang, Ji,Du, Fujun,et al. Molecular Gas Structures Traced by (CO)-C-13 Emission in the 18,190 (CO)-C-12 Molecular Clouds from the MWISP Survey[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2022,261(2):29. |
| APA | Yuan, Lixia.,Yang, Ji.,Du, Fujun.,Su, Yang.,Liu, Xunchuan.,...&Ma, Yuehui.(2022).Molecular Gas Structures Traced by (CO)-C-13 Emission in the 18,190 (CO)-C-12 Molecular Clouds from the MWISP Survey.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,261(2),29. |
| MLA | Yuan, Lixia,et al."Molecular Gas Structures Traced by (CO)-C-13 Emission in the 18,190 (CO)-C-12 Molecular Clouds from the MWISP Survey".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 261.2(2022):29. |
入库方式： OAI收割
来源：国家天文台
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