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Massive Outflows Associated with ATLASGAL Clumps

文献类型：期刊论文

作者Yang, A. Y.1,2,3; Thompson, M. A.2; Urquhart, J. S.4; Tian, W. W.1,3,5
刊名ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
出版日期2018-03-01
卷号235期号:1页码:20
关键词ISM: jets and outflows ISM: molecules stars: early-type stars: formation stars: massive submillimeter: ISM
ISSN号0067-0049
DOI10.3847/1538-4365/aaa297
英文摘要We have undertaken the largest survey for outflows within the Galactic plane using simultaneously observed (CO)-C-13 and (CO)-O-18 data. Out of a total of 919 ATLASGAL clumps, 325 have data suitable to identify outflows, and 225 (69% +/- 3%) show high-velocity outflows. The clumps with detected outflows show significantly higher clump masses (M-clump), bolometric luminosities (L-bol), luminosity-to-mass ratios (L-bol/M-clump), and peak H-2 column densities (N-H2) compared to those without outflows. Outflow activity has been detected within the youngest quiescent clump (i.e., 70 mu m weak) in this sample, and we find that the outflow detection rate increases with M-clump, L-bol, L-bol/M-clump, and N-H2, approaching 90% in some cases (UC H II regions - 93% +/- 3%; masers = 86% +/- 4%; HC H II regions = 100%). This high detection rate suggests that outflows are ubiquitous phenomena of massive star formation (MSF). The mean outflow mass entrainment rate implies a mean accretion rate of similar to 10(-4) M-circle dot yr(-1), in full agreement with the accretion rate predicted by theoretical models of MSF. Outflow properties are tightly correlated with Mclump, Lbol, and Lbol Mclump and show the strongest relation with the bolometric clump luminosity. This suggests that outflows might be driven by the most massive and luminous source within the clump. The correlations are similar for both low-mass and high-mass outflows over 7 orders of magnitude, indicating that they may share a similar outflow mechanism. Outflow energy is comparable to the turbulent energy within the clump; however, we find no evidence that outflows increase the level of clump turbulence as the clumps evolve. This implies that the origin of turbulence within clumps is fixed before the onset of star formation.
WOS关键词YOUNG STELLAR OBJECTS ; BIPOLAR MOLECULAR OUTFLOWS ; STAR-FORMING REGIONS ; MASER ASSOCIATED OUTFLOWS ; CO LINE FORMATION ; PROTOSTELLAR CANDIDATES ; HII-REGIONS ; SUBMILLIMETER SURVEY ; COMPLETE SAMPLE ; IMAGING SURVEY
资助项目NSFC from China's Ministry of Science and Technology[11603039] ; NSFC from China's Ministry of Science and Technology[11473038] ; UK Science and Technology Facilities Council[ST/M001008/1] ; UK Science and Technology Facilities Council through the China-UK SKA joint PhD program ; China Scholarship Council through the China-UK SKA joint PhD program
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000425775300002
出版者IOP PUBLISHING LTD
资助机构NSFC from China's Ministry of Science and Technology ; UK Science and Technology Facilities Council ; UK Science and Technology Facilities Council through the China-UK SKA joint PhD program ; China Scholarship Council through the China-UK SKA joint PhD program ; NSFC from China's Ministry of Science and Technology ; UK Science and Technology Facilities Council ; UK Science and Technology Facilities Council through the China-UK SKA joint PhD program ; China Scholarship Council through the China-UK SKA joint PhD program ; NSFC from China's Ministry of Science and Technology ; UK Science and Technology Facilities Council ; UK Science and Technology Facilities Council through the China-UK SKA joint PhD program ; China Scholarship Council through the China-UK SKA joint PhD program ; NSFC from China's Ministry of Science and Technology ; UK Science and Technology Facilities Council ; UK Science and Technology Facilities Council through the China-UK SKA joint PhD program ; China Scholarship Council through the China-UK SKA joint PhD program
源URL[http://ir.bao.ac.cn/handle/114a11/35733]  
专题中国科学院国家天文台
通讯作者Yang, A. Y.
作者单位1.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
2.Univ Hertfordshire, Sch Phys Astron & Math, Ctr Astrophys Res, Coll Lane, Hatfield AL10 9AB, Herts, England
3.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China
4.Univ Kent, Ctr Astrophys & Planetary Sci, Canterbury CT2 7NH, Kent, England
5.Univ Calgary, Dept Phys & Astron, Calgary, AB T2N 1N4, Canada
推荐引用方式
GB/T 7714		 Yang, A. Y.,Thompson, M. A.,Urquhart, J. S.,et al. Massive Outflows Associated with ATLASGAL Clumps[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2018,235(1):20.
APA Yang, A. Y.,Thompson, M. A.,Urquhart, J. S.,&Tian, W. W..(2018).Massive Outflows Associated with ATLASGAL Clumps.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,235(1),20.
MLA Yang, A. Y.,et al."Massive Outflows Associated with ATLASGAL Clumps".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 235.1(2018):20.

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