NAOC Open IR
CO observations towards HI-rich Ultradiffuse Galaxies
Wang, Junzhi1,2; Yang, Kai2,3; Zhang, Zhi-Yu4; Fang, Min5; Shi, Yong4; Liu, Shu6; Li, Juan1,2; Li, Fei1,2
2020-11-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume499Issue:1Pages:L26-L30
AbstractWe present CO observations towards a sample of six HI-rich Ultradiffuse galaxies (UDGs) as well as one UDG (VLSB-A) in the Virgo Cluster with the Institut de RadioAstronomie Millimetrique (IRAM) 30-m telescope. CO J = 1-0 is marginally detected at 4 sigma level in AGC 122966, as the first detection of CO emission in UDGs. We estimate upper limits of molecular mass in other galaxies from the non-detection of CO lines. These upper limits and the marginal CO detection in AGC 122966 indicate low mass ratios between molecular and atomic gas masses. With the star formation efficiency derived from the molecular gas, we suggest that the inefficiency of star formation in such HI-rich UDGs is likely caused by the low efficiency in converting molecules from atomic gas, instead of low efficiency in forming stars from molecular gas.
Keywordgalaxies: ISM galaxies: star formation
Funding OrganizationNational Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; INSU/CNRS (France) ; INSU/CNRS (France) ; MPG (Germany) ; MPG (Germany) ; IGN (Spain) ; IGN (Spain) ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; INSU/CNRS (France) ; INSU/CNRS (France) ; MPG (Germany) ; MPG (Germany) ; IGN (Spain) ; IGN (Spain) ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; INSU/CNRS (France) ; INSU/CNRS (France) ; MPG (Germany) ; MPG (Germany) ; IGN (Spain) ; IGN (Spain) ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; INSU/CNRS (France) ; INSU/CNRS (France) ; MPG (Germany) ; MPG (Germany) ; IGN (Spain) ; IGN (Spain)
DOI10.1093/mnrasl/slaa150
WOS KeywordBRIGHTNESS ; DETECTIONS
Language英语
Funding ProjectNational Key Basic Research and Development Program of China[2017YFA0402704] ; National Natural Science Foundation of China[11590783] ; National Natural Science Foundation of China[U1731237] ; INSU/CNRS (France) ; MPG (Germany) ; IGN (Spain) ; [068-15]
Funding OrganizationNational Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; INSU/CNRS (France) ; INSU/CNRS (France) ; MPG (Germany) ; MPG (Germany) ; IGN (Spain) ; IGN (Spain) ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; INSU/CNRS (France) ; INSU/CNRS (France) ; MPG (Germany) ; MPG (Germany) ; IGN (Spain) ; IGN (Spain) ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; INSU/CNRS (France) ; INSU/CNRS (France) ; MPG (Germany) ; MPG (Germany) ; IGN (Spain) ; IGN (Spain) ; National Key Basic Research and Development Program of China ; National Key Basic Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; INSU/CNRS (France) ; INSU/CNRS (France) ; MPG (Germany) ; MPG (Germany) ; IGN (Spain) ; IGN (Spain)
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000587776700006
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/81036
Collection中国科学院国家天文台
Corresponding AuthorWang, Junzhi
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China
3.Univ Cologne, Phys Inst 1, Zulpicher Str 77, D-50937 Cologne, Germany
4.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Peoples R China
5.CALTECH, Dept Astron, Pasadena, CA 91125 USA
6.Chinese Acad Sci, Natl Astron Observ, CAS Key Lab FAST, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Wang, Junzhi,Yang, Kai,Zhang, Zhi-Yu,et al. CO observations towards HI-rich Ultradiffuse Galaxies[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,499(1):L26-L30.
APA Wang, Junzhi.,Yang, Kai.,Zhang, Zhi-Yu.,Fang, Min.,Shi, Yong.,...&Li, Fei.(2020).CO observations towards HI-rich Ultradiffuse Galaxies.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,499(1),L26-L30.
MLA Wang, Junzhi,et al."CO observations towards HI-rich Ultradiffuse Galaxies".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 499.1(2020):L26-L30.
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