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The ALMaQUEST survey IX: The nature of the resolved star forming main sequence

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cam.depositDate2021-12-15
cam.issuedOnline2021-12-17
cam.oa.sapoa_rrs_na
cam.orpheus.successTue Feb 01 19:02:30 GMT 2022 - Embargo updated
dc.contributor.authorBaker, WM
dc.contributor.authorMaiolino, R
dc.contributor.authorBluck, AFL
dc.contributor.authorLin, L
dc.contributor.authorEllison, SL
dc.contributor.authorBelfiore, F
dc.contributor.authorPan, HA
dc.contributor.authorThorp, M
dc.contributor.orcidBaker, WM [0000-0003-0215-1104]
dc.contributor.orcidEllison, SL [0000-0002-1768-1899]
dc.contributor.orcidBelfiore, F [0000-0002-2545-5752]
dc.contributor.orcidThorp, M [0000-0003-0080-8547]
dc.date.accessioned2021-12-17T00:30:41Z
dc.date.available2021-12-17T00:30:41Z
dc.date.issued2022
dc.date.updated2021-12-15T13:25:46Z
dc.description.abstractWe investigate the nature of the scaling relations between the surface density of star formation rate ($\Sigma _{\rm SFR}$), stellar mass ($\Sigma _*$), and molecular gas mass ($\Sigma _{\rm H_2}$), aiming at distinguishing between the relations that are primary, i.e. more fundamental, and those which are instead an indirect by-product of the other relations. We use the ALMaQUEST survey and analyse the data by using both partial correlations and Random Forest regression techniques. We unambiguously find that the strongest intrinsic correlation is between $\Sigma _{\rm SFR}$ and $\Sigma_{\rm H_2}$ (i.e. the resolved Schmidt-Kennicutt relation), followed by the correlation between $\Sigma _{\rm H_2}$ and $\Sigma _*$ (resolved Molecular Gas Main Sequence, rMGMS). Once these two correlations are taken into account, we find that there is no evidence for any intrinsic correlation between $\Sigma _{\rm SFR}$ and $\Sigma _*$, implying that SFR is entirely driven by the amount of molecular gas, while its dependence on stellar mass (i.e. the resolved Star Forming Main Sequence, rSFMS) simply emerges as a consequence of the relationship between molecular gas and stellar mass.
dc.description.sponsorshipScience and Technology Facilities Council (STFC). ERC Advanced Grant 695671 "QUENCH".
dc.identifier.doi10.17863/CAM.79017
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/331564
dc.language.isoeng
dc.publisherOxford University Press (OUP)
dc.publisher.departmentDepartment of Physics Student
dc.publisher.urlhttp://dx.doi.org/10.1093/mnras/stab3672
dc.rightsAll Rights Reserved
dc.rights.urihttps://www.rioxx.net/licenses/all-rights-reserved/
dc.subjectgalaxies: evolution
dc.subjectgalaxies: formation
dc.subjectgalaxies: fundamental parameters
dc.subjectgalaxies: star formation
dc.titleThe ALMaQUEST survey IX: The nature of the resolved star forming main sequence
dc.typeArticle
dcterms.dateAccepted2021-12-10
prism.publicationNameMonthly Notices of the Royal Astronomical Society
pubs.funder-project-idEuropean Research Council (695671)
pubs.funder-project-idSTFC (2440936)
pubs.licence-display-nameApollo Repository Deposit Licence Agreement
pubs.licence-identifierapollo-deposit-licence-2-1
rioxxterms.typeJournal Article/Review
rioxxterms.versionAM
rioxxterms.versionofrecord10.1093/mnras/stab3672

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