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The distances to molecular clouds in the fourth Galactic quadrant
Chen, Bingqiu1; Wang, Shu2,3; Hou, Ligang2; Yang, Yihong1,4; Li, Zhiwen1,4; Zhao, He5,6; Jiang, Biwei5
2020-08-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume496Issue:4Pages:4637-4645
AbstractDistance measurements to molecular clouds are essential and important. We present directly measured distances to 169 molecular clouds in the fourth quadrant of the Milky Way. Based on the near-infrared photometry from the Two Micron All Sky Survey and the Vista Variables in the Via Lactea Survey, we select red clump stars in the overlapping directions of the individual molecular clouds and infer the bin averaged extinction values and distances to these stars. We track the extinction versus distance profiles of the sightlines towards the clouds and fit them with Gaussian dust distribution models to find the distances to the clouds. We have obtained distances to 169 molecular clouds selected from Rice et al. The clouds range in distances between 2 and 11 kpc from the Sun. The typical internal uncertainties in the distances are less than 5 per cent and the systematic uncertainty is about 7 per cent. The catalogue presented in this work is one of the largest homogeneous catalogues of distant molecular clouds with the direct measurement of distances. Based on the catalogue, we have tested different spiral arm models from the literature.
KeywordISM: clouds dust, extinction Galaxy: structure
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Yunnan University ; Yunnan University ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Yunnan University ; Yunnan University ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Yunnan University ; Yunnan University ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Yunnan University ; Yunnan University ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS
DOI10.1093/mnras/staa1827
WOS KeywordRED-CLUMP ; EXTINCTION ; MAGNITUDE ; STAR
Language英语
Funding ProjectNational Natural Science Foundation of China[11803029] ; National Natural Science Foundation of China[U1531244] ; National Natural Science Foundation of China[11533002] ; National Natural Science Foundation of China[11833006] ; National Natural Science Foundation of China[11988101] ; National Natural Science Foundation of China[11933011] ; National Natural Science Foundation of China[11833009] ; National Natural Science Foundation of China[U1731308] ; Yunnan University[C176220100007] ; Youth Innovation Promotion Association CAS
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Yunnan University ; Yunnan University ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Yunnan University ; Yunnan University ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Yunnan University ; Yunnan University ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Yunnan University ; Yunnan University ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000574923200041
PublisherOXFORD UNIV PRESS
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/81853
Collection中国科学院国家天文台
Corresponding AuthorChen, Bingqiu; Wang, Shu
Affiliation1.Yunnan Univ, South Western Inst Astron Res, Kunming 650500, Yunnan, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, CAS Key Lab Opt Astron, Beijing 100101, Peoples R China
4.Yunnan Univ, Sch Phys & Astron, Kunming 650500, Yunnan, Peoples R China
5.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
6.Univ Cote dAzur, Observ Cote dAzur, Lagrange Lab, CNRS, Observ Bd,CS 34229, F-06304 Nice 4, France
Recommended Citation
GB/T 7714
Chen, Bingqiu,Wang, Shu,Hou, Ligang,et al. The distances to molecular clouds in the fourth Galactic quadrant[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,496(4):4637-4645.
APA Chen, Bingqiu.,Wang, Shu.,Hou, Ligang.,Yang, Yihong.,Li, Zhiwen.,...&Jiang, Biwei.(2020).The distances to molecular clouds in the fourth Galactic quadrant.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,496(4),4637-4645.
MLA Chen, Bingqiu,et al."The distances to molecular clouds in the fourth Galactic quadrant".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 496.4(2020):4637-4645.
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