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dc.contributor.authorCheng, C*
dc.contributor.authorIbar, E*
dc.contributor.authorHughes, T M*
dc.contributor.authorVillanueva, V*
dc.contributor.authorLeiton, R*
dc.contributor.authorOrellana, G*
dc.contributor.authorMuñoz Arancibia, A*
dc.contributor.authorLu, N*
dc.contributor.authorXu, C K*
dc.contributor.authorWillmer, C N A*
dc.contributor.authorHuang, J*
dc.contributor.authorCao, T*
dc.contributor.authorYang, C*
dc.contributor.authorXue, Y Q*
dc.contributor.authorTorstensson, K*
dc.date.accessioned2018-05-02T18:59:47Z
dc.date.available2018-05-02T18:59:47Z
dc.date.issued2018-03-21
dc.identifier.citationC Cheng, E Ibar, T M Hughes, V Villanueva, R Leiton, G Orellana, A Muñoz Arancibia, N Lu, C K Xu, C N A Willmer, J Huang, T Cao, C Yang, Y Q Xue, K Torstensson; VALES – IV. Exploring the transition of star formation efficiencies between normal and starburst galaxies using APEX/SEPIA Band-5 and ALMA at low redshift, Monthly Notices of the Royal Astronomical Society, Volume 475, Issue 1, 21 March 2018, Pages 248–256, https://doi.org/10.1093/mnras/stx3183en_US
dc.identifier.issn0035-8711
dc.identifier.issn1365-2966
dc.identifier.doi10.1093/mnras/stx3183
dc.identifier.urihttp://hdl.handle.net/10150/627556
dc.description.abstractIn this work, we present new the Swedish-ESO PI receiver for the Atacama Pathfinder Experiment APEX/SEPIA Band-5 observations targeting the CO (J = 2-1) emission line of 24 Herschel-detected galaxies at z = 0.1-0.2. Combining this sample with our recent new Valparafso ALMA Line Emission Survey (VALES), we investigate the star formation efficiencies [SFEs = star formation rate (SFR)/M-H2] of galaxies at low redshift. We find the SFE of our sample bridges the gap between normal star-forming galaxies and Ultra-Luminous Infrared Galaxies (ULIRGs), which are thought to be triggered by different star formation modes. Considering the SFE' as the SFR and the L'(CO) ratio, our data show a continuous and smooth increment as a function of infrared luminosity (or star formation rate) with a scatter about 0.5 dex, instead of a steep jump with a bimodal behaviour. This result is due to the use of a sample with a much larger range of sSFR/sSFR(ms) using LIRGs, with luminosities covering the range between normal and ULIRGs. We conclude that the main parameters controlling the scatter of the SFE in star-forming galaxies are the systematic uncertainty of the alpha(CO) conversion factor, the gas fraction, and physical size.en_US
dc.description.sponsorshipChinese Academy of Sciences (CAS) through the CASSACA Postdoc Grant; CONICYT/ALMA funding Program in Astronomy/PCI Project [31140020]; FONDECYT [1171710]; Chinese Academy of Sciences (CAS); National Commission for Scientific and Technological Research of Chile (CONICYT) through a CAS-CONICYT Joint Postdoctoral Fellowship; Comite Mixto ESO-GOBIERNO DE CHILE; GEMINI-CONICYT FUND [32130024]; CONICYT (Chile) through FONDECYT postdoctoral research grant [3170942, 3160776]; NSFC [11673028]; National Key R&D Program of China [2017YFA0402704]; [NSFC-11643003]; [NSFC-11473026]; [11421303]en_US
dc.language.isoenen_US
dc.publisherOXFORD UNIV PRESSen_US
dc.relation.urlhttps://academic.oup.com/mnras/article/475/1/248/4712246en_US
dc.rights© 2017 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Societyen_US
dc.subjectgalaxies: ISMen_US
dc.subjectgalaxies: starbursten_US
dc.subjectgalaxies: star formationen_US
dc.subjectsubmillimetre: galaxiesen_US
dc.titleVALES – IV. Exploring the transition of star formation efficiencies between normal and starburst galaxies using APEX/SEPIA Band-5 and ALMA at low redshiften_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizona, Steward Observen_US
dc.identifier.journalMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETYen_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.source.journaltitleMonthly Notices of the Royal Astronomical Society
dc.source.volume475
dc.source.issue1
dc.source.beginpage248
dc.source.endpage256
refterms.dateFOA2018-05-02T18:59:48Z


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