中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
The Effect of Galaxy Interactions on Molecular Gas Properties

文献类型:期刊论文

作者Pan, Hsi-An5; Lin, Lihwai5; Hsieh, Bau-Ching5; Xiao, Ting3,4; Gao, Yang3; Ellison, Sara L.2; Scudder, Jillian M.1; Barrera-Ballesteros, Jorge25; Yuan, Fangting3; Saintonge, Amelie24
刊名ASTROPHYSICAL JOURNAL
出版日期2018-12-01
卷号868期号:2页码:20
ISSN号0004-637X
关键词galaxies: interactions galaxies: ISM ISM: molecules galaxies: star formation
DOI10.3847/1538-4357/aaeb92
英文摘要Galaxy interactions are often accompanied by an enhanced star formation rate (SFR). Since molecular gas is essential for star formation, it is vital to establish whether and by how much galaxy interactions affect the molecular gas properties. We investigate the effect of interactions on global molecular gas properties by studying a sample of 58 galaxies in pairs and 154 control galaxies. Molecular gas properties are determined from observations with the JCMT, PMO, and CSO telescopes and supplemented with data from the xCOLD GASS and JINGLE surveys at 12CO(1-0) and 12CO(2-1). The SFR, gas mass (MH2), and gas fraction (fgas) are all enhanced in galaxies in pairs by similar to 2.5 times compared to the controls matched in redshift, mass, and effective radius, while the enhancement of star formation efficiency (SFE equivalent to SFR/MH2) is less than a factor of 2. We also find that the enhancements in SFR, MH2 and fgas, increase with decreasing pair separation and are larger in systems with smaller stellar mass ratio. Conversely, the SFE is only enhanced in close pairs (separation <20 kpc) and equal-mass systems; therefore, most galaxies in pairs lie in the same parameter space on the SFR-MH2 plane as controls. This is the first time that the dependence of molecular gas properties on merger configurations is probed statistically with a relatively large sample and a carefully selected control sample for individual galaxies. We conclude that galaxy interactions do modify the molecular gas properties, although the strength of the effect is dependent on merger configuration.
资助项目Academia Sinica under the Career Development Award[AS-CDA-107-M03] ; Ministry of Science & Technology of Taiwan[MOST 107-2119-M-001-024-] ; Natural Sciences and Engineering Research Council of Canada ; National Key R&D Program of China[2017YFA0402704] ; National Key R&D Program of China[2016YFA0400702] ; National Key R&D Program of China[2017YFA0402700] ; NSFC[11420101002] ; CAS Key Research Program of Frontier Sciences ; National Science Foundation of China[11473002] ; National Science Foundation of China[11721303] ; UK Science and Technology Facilities Council[ST/M001008/1] ; National Science Centre, Poland, through POLONEZ grant[2015/19/P/ST9/04010] ; European Union's Horizon 2020 research and innovation program under Marie Sklodowska-Curie grant[665778] ; Science and Technology Facilities Council of the United Kingdom ; Alfred P. Sloan Foundation ; U.S. Department of Energy Office of Science ; Brazilian Participation Group ; Carnegie Institution for Science ; Carnegie Mellon University ; Chilean Participation Group ; French Participation Group ; Harvard-Smithsonian Center for Astrophysics ; Instituto de Astrofsica de Canarias ; Johns Hopkins University ; Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo ; Korean Participation Group ; Lawrence Berkeley National Laboratory ; Leibniz Institut fur Astrophysik Potsdam (AIP) ; Max-Planck-Institut fur Astronomie (MPIA Heidelberg) ; Max-Planck-Institut fur Astrophysik (MPA Garching) ; Max-Planck-Institut fur Extra-terrestrische Physik (MPE) ; National Astronomical Observatories of China ; New Mexico State University ; New York University ; University of Notre Dame ; Observatorio Nacional/MCTI ; Ohio State University ; Pennsylvania State University ; Shanghai Astronomical Observatory ; United Kingdom Participation Group ; Universidad Nacional Autonoma de Mexico ; University of Arizona ; University of Colorado Boulder ; University of Oxford ; University of Portsmouth ; University of Utah ; University of Virginia ; University of Washington ; University of Wisconsin ; Vanderbilt University ; Yale University
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000452021400002
源URL[http://119.78.226.72/handle/331011/32047]  
专题中国科学院上海天文台
通讯作者Pan, Hsi-An
作者单位1.Oberlin Coll, Dept Phys & Astron, Oberlin, OH 44074 USA
2.Univ Victoria, Dept Phys & Astron, Finnerty Rd, Victoria, BC V8P 1A1, Canada
3.Shanghai Astron Observ, Nandan Rd 80, Shanghai 200030, Peoples R China
4.Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China
5.Acad Sinica, Inst Astron & Astrophys, AS NTU Astron Math Bldg 1,Sect 4, Taipei 10617, Taiwan
6.Joetsu Univ Educ, Yamayashiki Machi, Joetsu, Niigata 9438512, Japan
7.Adam Mickiewicz Univ, Astron Observ Inst, Fac Phys, Ul Sloneczna 36, PL-60286 Poznan, Poland
8.Chinese Acad Sci, Natl Astron Observ, A20 Datun Rd, Beijing 100012, Peoples R China
9.Kyung Hee Univ, Sch Space Res, Yongin 17104, Gyeonggi, South Korea
10.Univ Sussex, Dept Phys & Astron, Astron Ctr, Brighton BN1 9QH, E Sussex, England
推荐引用方式
GB/T 7714
Pan, Hsi-An,Lin, Lihwai,Hsieh, Bau-Ching,et al. The Effect of Galaxy Interactions on Molecular Gas Properties[J]. ASTROPHYSICAL JOURNAL,2018,868(2):20.
APA Pan, Hsi-An.,Lin, Lihwai.,Hsieh, Bau-Ching.,Xiao, Ting.,Gao, Yang.,...&Tosaki, Tomoka.(2018).The Effect of Galaxy Interactions on Molecular Gas Properties.ASTROPHYSICAL JOURNAL,868(2),20.
MLA Pan, Hsi-An,et al."The Effect of Galaxy Interactions on Molecular Gas Properties".ASTROPHYSICAL JOURNAL 868.2(2018):20.

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来源:上海天文台

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