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dc.contributor.authorPan, Hsi-An
dc.contributor.authorLin, Lihwai
dc.contributor.authorHsieh, Bau-Ching
dc.contributor.authorXiao, Ting
dc.contributor.authorGao, Yang
dc.contributor.authorEllison, Sara L.
dc.contributor.authorScudder, Jillian M.
dc.contributor.authorBarrera-Ballesteros, Jorge
dc.contributor.authorYuan, Fangting
dc.contributor.authorSaintonge, Amélie
dc.contributor.authorWilson, Christine D.
dc.contributor.authorHwang, Ho Seong
dc.contributor.authorLooze, Ilse De
dc.contributor.authorGao, Yu
dc.contributor.authorHo, Luis C.
dc.contributor.authorBrinks, Elias
dc.contributor.authorMok, Angus
dc.contributor.authorBrown, Toby
dc.contributor.authorDavis, Timothy A.
dc.contributor.authorWilliams, Thomas G.
dc.contributor.authorChung, Aeree
dc.contributor.authorParsons, Harriet
dc.contributor.authorBureau, Martin
dc.contributor.authorSargent, Mark T.
dc.contributor.authorChung, Eun Jung
dc.contributor.authorKim, Eunbin
dc.contributor.authorLiu, Tie
dc.contributor.authorMichałowski, Michał J.
dc.contributor.authorTosaki, Tomoka
dc.date.accessioned2018-12-17T12:46:23Z
dc.date.available2018-12-17T12:46:23Z
dc.date.issued2018-12-03
dc.identifier.citationPan , H-A , Lin , L , Hsieh , B-C , Xiao , T , Gao , Y , Ellison , S L , Scudder , J M , Barrera-Ballesteros , J , Yuan , F , Saintonge , A , Wilson , C D , Hwang , H S , Looze , I D , Gao , Y , Ho , L C , Brinks , E , Mok , A , Brown , T , Davis , T A , Williams , T G , Chung , A , Parsons , H , Bureau , M , Sargent , M T , Chung , E J , Kim , E , Liu , T , Michałowski , M J & Tosaki , T 2018 , ' The Effect of Galaxy Interactions on Molecular Gas Properties ' , The Astrophysical Journal , vol. 868 , no. 2 , 132 , pp. 20 . https://doi.org/10.3847/1538-4357/aaeb92
dc.identifier.issn0004-637X
dc.identifier.otherPURE: 15578733
dc.identifier.otherPURE UUID: 77764c27-737f-4774-affd-fe8238fd2118
dc.identifier.otherArXiv: http://arxiv.org/abs/1810.10162v1
dc.identifier.otherORCID: /0000-0002-7758-9699/work/54143417
dc.identifier.otherScopus: 85057593294
dc.identifier.urihttp://hdl.handle.net/2299/20859
dc.description© 2018. The American Astronomical Society. All rights reserved.
dc.description.abstractGalaxy 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 (), and gas fraction (f gas) are all enhanced in galaxies in pairs by ∼2.5 times compared to the controls matched in redshift, mass, and effective radius, while the enhancement of star formation efficiency (SFE ≡SFR/) is less than a factor of 2. We also find that the enhancements in SFR, and f gas, 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- 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.en
dc.format.extent1
dc.language.isoeng
dc.relation.ispartofThe Astrophysical Journal
dc.rightsOpen
dc.subjectgalaxies: interactions
dc.subjectgalaxies: ISM
dc.subjectgalaxies: star formation
dc.subjectISM: molecules
dc.subjectAstronomy and Astrophysics
dc.subjectSpace and Planetary Science
dc.titleThe Effect of Galaxy Interactions on Molecular Gas Propertiesen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85057593294&partnerID=8YFLogxK
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2018-12-03
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.3847/1538-4357/aaeb92
rioxxterms.licenseref.uriOther
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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