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dc.contributor.authorZheng, Zhengpt_BR
dc.contributor.authorWang, Huiyuanpt_BR
dc.contributor.authorGe, Junqiangpt_BR
dc.contributor.authorMao, Shudept_BR
dc.contributor.authorLi, Chengpt_BR
dc.contributor.authorLi, Ranpt_BR
dc.contributor.authorMo, Houjunpt_BR
dc.contributor.authorGoddard, Danielpt_BR
dc.contributor.authorBundy, Kevinpt_BR
dc.contributor.authorLi, Hongyupt_BR
dc.contributor.authorNair, Preethi B.pt_BR
dc.contributor.authorLin, Lihwaipt_BR
dc.contributor.authorLong, Richard J.pt_BR
dc.contributor.authorRiffel, Rogériopt_BR
dc.contributor.authorThomas, D.pt_BR
dc.contributor.authorMasters, K.L.pt_BR
dc.contributor.authorBizyaev, D.pt_BR
dc.contributor.authorBrownstein, Joel R.pt_BR
dc.contributor.authorZhang, Kaipt_BR
dc.contributor.authorLaw, David R.pt_BR
dc.contributor.authorDrory, Nivpt_BR
dc.contributor.authorLopes, Alexandre Romanpt_BR
dc.contributor.authorMalanushenko, E.pt_BR
dc.date.accessioned2017-06-20T02:33:18Zpt_BR
dc.date.issued2017pt_BR
dc.identifier.issn0035-8711pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/159777pt_BR
dc.description.abstractWe present a study on the stellar age and metallicity distributions for 1105 galaxies using the STARLIGHT software on MaNGA (Mapping Nearby Galaxies at APO) integral field spectra.We derive age and metallicity gradients by fitting straight lines to the radial profiles, and explore their correlations with total stellar mass M∗, NUV − r colour and environments, as identified by both the large-scale structure (LSS) type and the local density. We find that the mean age and metallicity gradients are close to zero but slightly negative, which is consistent with the inside-out formation scenario. Within our sample, we find that both the age and metallicity gradients show weak or no correlation with either the LSS type or local density environment. In addition, we also study the environmental dependence of age and metallicity values at the effective radii. The age and metallicity values are highly correlated with M∗ and NUV − r and are also dependent on LSS type as well as local density. Low-mass galaxies tend to be younger and have lower metallicity in low-density environments while high-mass galaxies are less affected by environment.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofMonthly notices of the Royal Astronomical Society. Oxford. Vol. 465, no. 4 (Mar. 2017), p. 4572-4588pt_BR
dc.rightsOpen Accessen
dc.subjectGalaxies abundancesen
dc.subjectFormacao de galaxiaspt_BR
dc.subjectEvolucao estelarpt_BR
dc.subjectGalaxies evolutionen
dc.subjectGalaxies formationen
dc.subjectPopulacoes estelarespt_BR
dc.subjectMetalicidadept_BR
dc.subjectGalaxies statisticsen
dc.subjectGalaxies stellar contenten
dc.subjectMapeamentos astronômicospt_BR
dc.subjectGalaxies structureen
dc.titleSDSS-IV MaNGA : environmental dependence of stellar age and metallicity gradients in nearby galaxiespt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001021990pt_BR
dc.type.originEstrangeiropt_BR


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