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dc.contributor.authorSchaefer, Adam Len
dc.contributor.authorTremonti, Christyen
dc.contributor.authorPace, Zacharyen
dc.contributor.authorBelfiore, Francescoen
dc.contributor.authorArgudo-Fernandez, Mariaen
dc.contributor.authorBershady, Matthew Aen
dc.contributor.authorDrory, Niven
dc.contributor.authorJones, Amyen
dc.contributor.authorMaiolino, Robertoen
dc.contributor.authorStark, Daviden
dc.contributor.authorWake, Daviden
dc.contributor.authorYan, Renbinen
dc.date.accessioned2019-10-07T23:30:10Z
dc.date.available2019-10-07T23:30:10Z
dc.date.issued2019-10en
dc.identifier.issn0004-637X
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/297518
dc.description.abstractWe investigate the environmental dependence of the local gas-phase metallicity in a sample of star-forming galaxies from the MaNGA survey. Satellite galaxies with stellar masses in the range $9<\log(M_{*}/M_{\odot})<10$ are found to be $\sim 0.05 \, \mathrm{dex}$ higher in metallicity than centrals of similar stellar mass. Within the low-mass satellite population, we find that the interstellar medium (ISM) metallicity depends most strongly on the stellar mass of the galaxy that is central to the halo, though there is no obvious difference in the metallicity gradients. At fixed total stellar mass, the satellites of high mass ($M_{*}>10^{10.5} \, \mathrm{M_{\odot}}$) centrals are $\sim 0.1 \, \mathrm{dex}$ more metal rich than satellites of low-mass ($M_{*} < 10^{10} \, \mathrm{M_{\odot}}$) centrals, controlling for local stellar mass surface density and gas fraction. Fitting a gas-regulator model to the spaxel data, we are able to account for variations in the local gas fraction, stellar mass surface density and local escape velocity-dependent outflows. We find that the best explanation for the metallicity differences is the variation in the average metallicity of accreted gas between different environments that depends on the stellar mass of the dominant galaxies in each halo. This is interpreted as evidence for the exchange of enriched gas between galaxies in dense environments that is predicted by recent simulations.
dc.publisherIOP Publishing
dc.rightsAll rights reserved
dc.rights.uri
dc.titleSDSS-IV MaNGA: Evidence for enriched accretion onto satellite galaxies in dense environmentsen
dc.typeArticle
prism.publicationDate2019en
prism.publicationNameAstrophysical Journalen
prism.volume884en
dc.identifier.doi10.17863/CAM.44573
dcterms.dateAccepted2019-09-10en
rioxxterms.versionofrecord10.3847/1538-4357/ab43caen
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2019-10en
dc.contributor.orcidMaiolino, Roberto [0000-0002-4985-3819]
dc.identifier.eissn1538-4357
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idSTFC (ST/M001172/1)
pubs.funder-project-idECH2020 EUROPEAN RESEARCH COUNCIL (ERC) (695671)
cam.issuedOnline2019-10-22en
cam.orpheus.successMon Jun 22 08:20:36 BST 2020 - The item has an open VoR version.*
cam.orpheus.counter13*
rioxxterms.freetoread.startdate2100-01-01


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