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dc.contributor.authorGoddard, Danielpt_BR
dc.contributor.authorThomas, D.pt_BR
dc.contributor.authorMaraston, Claudiapt_BR
dc.contributor.authorWestfall, Kyle B.pt_BR
dc.contributor.authorEtherington, Jamespt_BR
dc.contributor.authorRiffel, Rogériopt_BR
dc.contributor.authorMallmann, Nícolas Dulliuspt_BR
dc.contributor.authorZheng, Zhengpt_BR
dc.contributor.authorArgudo-Fernández, Mariapt_BR
dc.contributor.authorLian, Jianhuipt_BR
dc.contributor.authorBershady, Matthew A.pt_BR
dc.contributor.authorBundy, Kevinpt_BR
dc.contributor.authorDrory, Nivpt_BR
dc.contributor.authorLaw, David R.pt_BR
dc.contributor.authorYan, Renbinpt_BR
dc.contributor.authorWake, D.A.pt_BR
dc.contributor.authorWeijmans, Anne Mariept_BR
dc.contributor.authorBizyaev, D.pt_BR
dc.contributor.authorBrownstein, Joel R.pt_BR
dc.contributor.authorLane, Richard R.pt_BR
dc.contributor.authorMaiolino, Robertopt_BR
dc.contributor.authorMasters, K.L.pt_BR
dc.contributor.authorMerrifield, Michaelpt_BR
dc.contributor.authorNitschelm, Christianpt_BR
dc.contributor.authorPan, K.pt_BR
dc.contributor.authorRoman-Lopes, Alexandrept_BR
dc.contributor.authorStorchi-Bergmann, Thaisapt_BR
dc.contributor.authorSchneider, D.P.pt_BR
dc.date.accessioned2017-09-28T02:27:55Zpt_BR
dc.date.issued2017pt_BR
dc.identifier.issn0035-8711pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/168974pt_BR
dc.description.abstractWe study the internal gradients of stellar population propertieswithin 1.5 Re for a representative sample of 721 galaxies, with stellar masses ranging between 109M and 1011.5M from the SDSS-IV MaNGA Integral-Field-Unit survey. Through the use of our full spectral fitting code FIREFLY, we derive light- and mass-weighted stellar population properties and their radial gradients, as well as full star formation and metal enrichment histories. We also quantify the impact that different stellar population models and full spectral fitting routines have on the derived stellar population properties and the radial gradient measurements. In our analysis, we find that age gradients tend to be shallow for both early-type and late-type galaxies. Mass-weighted age gradients of early-types arepositive (∼0.09 dex/Re) pointing to ‘outside– in’ progression of star formation, while late-type galaxies have negative light-weighted age gradients (∼−0.11 dex/Re), suggesting an ‘inside–out’ formation of discs.We detect negative metallicity gradients in both early- and late-type galaxies, but these are significantly steeper in late-types, suggesting that the radial dependence of chemical enrichment processes and the effect of gas inflow and metal transport are far more pronounced in discs. Metallicity gradients of both morphological classes correlate with galaxy mass, with negative metallicity gradients becoming steeper with increasing galaxy mass. The correlation with mass is stronger for late-type galaxies, with a slope of d(∇[Z/H])/d(logM) ∼ −0.2 ± 0.05 , compared to d(∇[Z/H])/d(logM) ∼ −0.05 ± 0.05 for early-types. This result suggests that the merger history plays a relatively small role in shaping metallicity gradients of galaxies.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofMonthly notices of the Royal Astronomical Society. Oxford. Vol. 466, no. 4 (May 2017), p. 4731–4758pt_BR
dc.rightsOpen Accessen
dc.subjectGalaxies: elliptical and lenticular CDen
dc.subjectFormacao de galaxiaspt_BR
dc.subjectGalaxies: evolutionen
dc.subjectPopulacoes estelarespt_BR
dc.subjectGalaxias elipticaspt_BR
dc.subjectGalaxies: formationen
dc.subjectGalaxies: spiralen
dc.subjectMapeamentos astronômicospt_BR
dc.subjectGalaxies: star formationen
dc.subjectGalaxies: stellar contenten
dc.titleSDSS-IV MaNGA : spatially resolved star formation histories in galaxies as a function of galaxy mass and typept_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001027098pt_BR
dc.type.originEstrangeiropt_BR


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