NAOC Open IR
Formation of Massive Protostellar Clusters-Observations of Massive 70 mu m Dark Molecular Clouds
Li, Shanghuo1,2,3; Zhang, Qizhou2; Pillai, Thushara4; Stephens, Ian W.2; Wang, Junzhi1; Li, Fei1,3
2019-12-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume886Issue:2Pages:16
AbstractWe 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.
Funding OrganizationNational 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
DOI10.3847/1538-4357/ab464e
WOS KeywordSTAR-FORMATION ; GRAVITATIONAL COLLAPSE ; PHYSICAL-PROPERTIES ; DENSE CORES ; DUST RATIO ; FRAGMENTATION ; ACCRETION ; OUTFLOW ; ENVIRONMENT ; POPULATION
Language英语
Funding ProjectNational 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]
Funding OrganizationNational 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
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000515070100008
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/54433
Collection中国科学院国家天文台
Corresponding AuthorLi, Shanghuo
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
2.Harvard & Smithsonian, Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
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
Recommended Citation
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.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Li, Shanghuo]'s Articles
[Zhang, Qizhou]'s Articles
[Pillai, Thushara]'s Articles
Baidu academic
Similar articles in Baidu academic
[Li, Shanghuo]'s Articles
[Zhang, Qizhou]'s Articles
[Pillai, Thushara]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Li, Shanghuo]'s Articles
[Zhang, Qizhou]'s Articles
[Pillai, Thushara]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.