Formation of Massive Protostellar Clusters-Observations of Massive 70 mu m Dark Molecular Clouds
文献类型：期刊论文
| 作者 | Li, Shanghuo1,2,3; Zhang, Qizhou1; Pillai, Thushara4; Stephens, Ian W.1; Wang, Junzhi2; Li, Fei2,3 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2019-12-01 |
| 卷号 | 886期号:2页码:16 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ab464e |
| 英文摘要 | We present Submillimeter Array observations of seven massive molecular clumps that are dark in the far-infrared for wavelengths up to 70 mu m. Our 1.3.mm continuum images reveal 44 dense cores, with gas masses ranging from 1.4 to 77.1 M-circle dot. Twenty-nine dense cores have masses greater than 8 M-circle dot and the other 15 dense cores have masses between 1.4 and 7.5 M-circle dot. Assuming the core density follows a power law in radius rho proportional to r(-b), the index b is found to be between 0.6 and 2.1, with a mean value of 1.3. The virial analysis reveals that the dense cores are not in virial equilibrium. CO outflow emission was detected toward six out of seven molecular clumps and associated with 17 dense cores. For five of these cores, CO emissions appear to have line wings at velocities of greater than 30 km s(-1) with respect to the source systemic velocity, which indicates that most of the clumps harbor protostars and thus are not quiescent in star formation. The estimated outflow timescale increases with core mass, which likely indicates that massive cores have longer accretion timescales than less massive ones. The fragmentation analysis shows that the masses of low-mass and massive cores are roughly consistent with thermal and turbulent Jeans masses, respectively. |
| WOS关键词 | STAR-FORMATION ; GRAVITATIONAL COLLAPSE ; PHYSICAL-PROPERTIES ; DENSE CORES ; DUST RATIO ; FRAGMENTATION ; ACCRETION ; OUTFLOW ; ENVIRONMENT ; POPULATION |
| 资助项目 | National Key R&D Program of China[2017YFA0402604] ; CfA pre-doctoral fellowship ; Chinese Scholarship Council ; National Natural Science Foundation of China[11629302] ; National Natural Science Foundation of China[U1731237] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000515070100008 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | National Key R&D Program of China ; National Key R&D Program of China ; CfA pre-doctoral fellowship ; CfA pre-doctoral fellowship ; Chinese Scholarship Council ; Chinese Scholarship Council ; 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 ; CfA pre-doctoral fellowship ; CfA pre-doctoral fellowship ; Chinese Scholarship Council ; Chinese Scholarship Council ; 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 ; CfA pre-doctoral fellowship ; CfA pre-doctoral fellowship ; Chinese Scholarship Council ; Chinese Scholarship Council ; 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 ; CfA pre-doctoral fellowship ; CfA pre-doctoral fellowship ; Chinese Scholarship Council ; Chinese Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/54432]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Li, Shanghuo |
| 作者单位 | 1.Harvard & Smithsonian, Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA 2.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 3.Univ Chinese Acad Sci, 19A Yuquanlu, Beijing 100049, Peoples R China 4.Boston Univ, Inst Astrophys Res, 725 Commonwealth Ave, Boston, MA 02215 USA |
| 推荐引用方式 GB/T 7714 | Li, Shanghuo,Zhang, Qizhou,Pillai, Thushara,et al. Formation of Massive Protostellar Clusters-Observations of Massive 70 mu m Dark Molecular Clouds[J]. ASTROPHYSICAL JOURNAL,2019,886(2):16. |
| APA | Li, Shanghuo,Zhang, Qizhou,Pillai, Thushara,Stephens, Ian W.,Wang, Junzhi,&Li, Fei.(2019).Formation of Massive Protostellar Clusters-Observations of Massive 70 mu m Dark Molecular Clouds.ASTROPHYSICAL JOURNAL,886(2),16. |
| MLA | Li, Shanghuo,et al."Formation of Massive Protostellar Clusters-Observations of Massive 70 mu m Dark Molecular Clouds".ASTROPHYSICAL JOURNAL 886.2(2019):16. |
入库方式： OAI收割
来源：国家天文台
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