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dc.contributor.authorHo, I-Ting
dc.contributor.authorMeidt, Sharon E.
dc.contributor.authorKudritzki, Rolf-Peter
dc.contributor.authorGroves, Brent A.
dc.contributor.authorSeibert, Mark
dc.contributor.authorMadore, Barry F.
dc.contributor.authorSchinnerer, Eva
dc.contributor.authorRich, Jeffrey A.
dc.contributor.authorKobayashi, Chiaki
dc.contributor.authorKewley, Lisa J.
dc.date.accessioned2018-10-22T15:57:23Z
dc.date.available2018-10-22T15:57:23Z
dc.date.issued2018-10-15
dc.identifier.citationHo , I-T , Meidt , S E , Kudritzki , R-P , Groves , B A , Seibert , M , Madore , B F , Schinnerer , E , Rich , J A , Kobayashi , C & Kewley , L J 2018 , ' Azimuthal variations of gas-phase oxygen abundance in NGC 2997 ' , Astronomy & Astrophysics , vol. 618 , A64 . https://doi.org/10.1051/0004-6361/201833262
dc.identifier.issn0004-6361
dc.identifier.otherPURE: 15031953
dc.identifier.otherPURE UUID: 0b17c661-9416-43f6-9901-7956aaebbf62
dc.identifier.otherArXiv: http://arxiv.org/abs/1807.02043v1
dc.identifier.otherORCID: /0000-0002-4343-0487/work/62750439
dc.identifier.urihttp://hdl.handle.net/2299/20735
dc.description13 pages, 17 figures, accepted to A&A Reproduced with permission from Astronomy & Astrophysics. © 2018 ESO.
dc.description.abstractThe azimuthal variation of the HII region oxygen abundance in spiral galaxies is a key observable for understanding how quickly oxygen produced by massive stars can be dispersed within the surrounding interstellar medium. Observational constraints on the prevalence and magnitude of such azimuthal variations remain rare in the literature. Here, we report the discovery of pronounced azimuthal variations of HII region oxygen abundance in NGC 2997, a spiral galaxy at approximately 11.3 Mpc. Using 3D spectroscopic data from the TYPHOON Program, we study the HII region oxygen abundance at a physical resolution of 125 pc. Individual HII regions or complexes are identified in the 3D optical data and their strong emission line fluxes measured to constrain their oxygen abundances. We find 0.06 dex azimuthal variations in the oxygen abundance on top of a radial abundance gradient that is comparable to those seen in other star-forming disks. At a given radial distance, the oxygen abundances are highest in the spiral arms and lower in the inter-arm regions, similar to what has been reported in NGC 1365 using similar observations. We discuss whether the azimuthal variations could be recovered when the galaxy is observed at worse physical resolutions and lower signal-to-noise ratios.en
dc.language.isoeng
dc.relation.ispartofAstronomy & Astrophysics
dc.rightsOpen
dc.subjectastro-ph.GA
dc.titleAzimuthal variations of gas-phase oxygen abundance in NGC 2997en
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
dc.identifier.urlhttps://arxiv.org/abs/1807.02043
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2018-10-15
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1051/0004-6361/201833262
rioxxterms.licenseref.uriOther
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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