NAOC Open IR
Searching for shocks in high-mass starless clump candidates
Zhu, Feng-Yao1; Wang, Jun-Zhi1; Liu, Tie1,2; Kim, Kee-Tae2,3; Zhu, Qing-Feng4; Li, Fei1
2020-12-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume499Issue:4Pages:6018-6034
AbstractIn order to search for shocks in the very early stage of star formation, we performed single-point surveys of SiO J = 1-0, 2-1, and 3-2 lines and the H2CO 2(12)-1(11) line towards a sample of 100 high-mass starless clump candidates (SCCs) by using the Korean VLBI Network (KVN) 21-m radio telescopes. The detection rates of the SiO J = 1-0, 2-1, 3-2 lines, and the H2CO line are 31.0, 31.0, 19.5, and 93.0 per cent, respectively. Shocks seem to be common in this stage of massive star formation. The widths of the observed SiO lines [full width at zero power (FWZP)] range from 3.4 to 55.1 kms(-1). A significant fraction (similar to 29 per cent) of the detected SiO spectra have broad line widths (FWZP > 20 km s(-1)), which are very likely associated with fast shocks driven by protostellar outflows. This result suggests that about one third of the SiO-detected SCCs are not really starless but protostellar. On the other hand, about 40 per cent of the detected SiO spectra show narrow line widths (FWZP < 10 km s(-1)) probably associated with low-velocity shocks which are not necessarily protostellar in origin. The estimated SiO column densities are mostly 0.31-4.32 x 10(12) cm(-2). Comparing the SiO column densities derived from SiO J = 1-0 and 2-1 lines, we suggest that the SiO molecules in the SCCs may be in the non-LTE condition. The SiO abundances to H-2 are usually 0.20-10.92 x 10(-10).
Keywordshock waves stars: formation stars: protostars ISM: structure radio lines: ISM
Funding OrganizationNational Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; National Science Foundation of China ; National Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; National Science Foundation of China ; National Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; National Science Foundation of China ; National Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; National Science Foundation of China ; National Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation
DOI10.1093/mnras/staa3100
WOS KeywordSIO EMISSION ; GAS
Language英语
Funding ProjectNational Key Basic Research and Development Program of China[2017YEA0402604] ; National Science Foundation of China[11590783] ; National Science Foundation of China[U1731237] ; China Postdoctoral Science Foundation[2020M671267]
Funding OrganizationNational Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; National Science Foundation of China ; National Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; National Science Foundation of China ; National Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; National Science Foundation of China ; National Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; National Science Foundation of China ; National Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000599131700099
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/80492
Collection中国科学院国家天文台
Corresponding AuthorZhu, Feng-Yao
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
2.Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea
3.Univ Sci & Technol, Korea UST, 217 Gajeong Ro, Daejeon 34113, South Korea
4.Univ Sci & Technol China, Dept Astron, CAS Key Lab Res Galaxies & Cosmol, Hefei 230026, Peoples R China
Recommended Citation
GB/T 7714
Zhu, Feng-Yao,Wang, Jun-Zhi,Liu, Tie,et al. Searching for shocks in high-mass starless clump candidates[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,499(4):6018-6034.
APA Zhu, Feng-Yao,Wang, Jun-Zhi,Liu, Tie,Kim, Kee-Tae,Zhu, Qing-Feng,&Li, Fei.(2020).Searching for shocks in high-mass starless clump candidates.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,499(4),6018-6034.
MLA Zhu, Feng-Yao,et al."Searching for shocks in high-mass starless clump candidates".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 499.4(2020):6018-6034.
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
[Zhu, Feng-Yao]'s Articles
[Wang, Jun-Zhi]'s Articles
[Liu, Tie]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhu, Feng-Yao]'s Articles
[Wang, Jun-Zhi]'s Articles
[Liu, Tie]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhu, Feng-Yao]'s Articles
[Wang, Jun-Zhi]'s Articles
[Liu, Tie]'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.