NAOC Open IR
Filament intersections and cold dense cores in Orion A North
Zhang, Chao1; Ren, Zhiyuan1; Wu, Jingwen1; Li, Di1,2,3; Zhu, Lei4; Zhang, Qizhou5; Mardones, Diego6; Wang, Chen7; Shi, Hui1; Yue, Nannan1,2; Luo, Gan1,2; Xie, Jinjin1,2; Jiao, Sihan1,2; Liu, Shu1,2; Xu, Xuefang1,2; Wang, Shen1,2
2020-09-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume497Issue:1Pages:793-808
AbstractWe studied the filament structures and cold dense cores in OMC-2,3 region in Orion A North molecular cloud using the high-resolution N2H+ (1-0) spectral cube observed with the Atacama Large Millimeter/Submillimeter Array (ALMA). The filament network over a total length of 2 pc is found to contain 170 intersections and 128 candidate dense cores. The dense cores are all displaced from the infrared point sources (possible young stars), and the major fraction of cores (103) are located around the intersections. Towards the intersections, there is also an increasing trend for the total column density N-tot as well as the power-law index of the column-density Probability Distribution Function (N-PDF), suggesting that the intersections would in general have more significant gas assembly than the other part of the filament paths. The virial analysis shows that the dense cores mostly have virial mass ratio of alpha(vir) = M-vir/M-gas < 1.0, suggesting them to be bounded by the self-gravity. In the mean time, only about 23 per cent of the cores have critical mass ratio of alpha(cri)t = M-crit/M-gas < 1.0, suggesting them to be unstable against core collapse. Combining these results, it shows that the major fraction of the cold starless and possible pre-stellar cores in OMC-2,3 are being assembled around the intersections, and currently in a gravitationally bound state. But more extensive core-collapse and star formation may still require continuous core mass growth or other perturbations.
Keywordstars: formation ISM: clouds ISM: individual objects: Orion A North ISM: molecules ISM: structure
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS International Partnership Program ; CAS International Partnership Program ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS International Partnership Program ; CAS International Partnership Program ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS International Partnership Program ; CAS International Partnership Program ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS International Partnership Program ; CAS International Partnership Program ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences
DOI10.1093/mnras/staa1958
Language英语
Funding ProjectNational Natural Science Foundation of China[11988101] ; National Natural Science Foundation of China[11725313] ; National Natural Science Foundation of China[11403041] ; National Natural Science Foundation of China[11373038] ; National Natural Science Foundation of China[11373045] ; National Natural Science Foundation of China[U1931117] ; CAS International Partnership Program[114A11KYSB20160008] ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS International Partnership Program ; CAS International Partnership Program ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS International Partnership Program ; CAS International Partnership Program ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS International Partnership Program ; CAS International Partnership Program ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS International Partnership Program ; CAS International Partnership Program ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000574919600056
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/81760
Collection中国科学院国家天文台
Corresponding AuthorRen, Zhiyuan; Wu, Jingwen; Li, Di
Affiliation1.Chinese Acad Sci, Natl Astron Observ, A20 Datun Rd, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Kwazulu Parental, NAOC UKZN Computat Astrophys Ctr NUCAC, ZA-4000 Durban, South Africa
4.Chinese Acad Sci, South Amer Ctr Astron, A20 Datun Rd, Beijing 100101, Peoples R China
5.Harvard & Smithsonian, Ctr Astrophys, 60 Garden St, Cambridge, MA 02318 USA
6.Univ Chile, Dept Astron, Casilla 36-D, Santiago, Chile
7.CSIRO Data61, Sydney, NSW 2015, Australia
Recommended Citation
GB/T 7714
Zhang, Chao,Ren, Zhiyuan,Wu, Jingwen,et al. Filament intersections and cold dense cores in Orion A North[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,497(1):793-808.
APA Zhang, Chao.,Ren, Zhiyuan.,Wu, Jingwen.,Li, Di.,Zhu, Lei.,...&Wang, Shen.(2020).Filament intersections and cold dense cores in Orion A North.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,497(1),793-808.
MLA Zhang, Chao,et al."Filament intersections and cold dense cores in Orion A North".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 497.1(2020):793-808.
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