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dc.contributor.authorGoddard, Daniel
dc.contributor.authorThomas, Daniel
dc.contributor.authorMaraston, Claudia
dc.contributor.authorWestfall, Kyle B.
dc.contributor.authorEtherington, James
dc.contributor.authorRiffel, Rogerio
dc.contributor.authorMallmann, Nicolas D.
dc.contributor.authorZheng, Zheng
dc.contributor.authorArgudo-Fernández, Maria
dc.contributor.authorLian, Jianhui
dc.contributor.authorBershady, Matthew A.
dc.contributor.authorBundy, Kevin
dc.contributor.authorDrory, Niv
dc.contributor.authorLaw, David R.
dc.contributor.authorYan, Renbin
dc.contributor.authorWake, David
dc.contributor.authorWeijmans, Anne-Marie
dc.contributor.authorBizyaev, Dmitry
dc.contributor.authorBrownstein, Joel R.
dc.contributor.authorLane, Richard R.
dc.contributor.authorMaiolino, Roberto
dc.contributor.authorMasters, Karen L.
dc.contributor.authorMerrifield, Michael R.
dc.contributor.authorNitschelm, Christian
dc.contributor.authorPan, Kaike
dc.contributor.authorRoman-Lopes, Alexandre
dc.contributor.authorStorchi-Bergmann, Thaisa
dc.contributor.authorSchneider, Donald P.
dc.identifier.citationGoddard , D , Thomas , D , Maraston , C , Westfall , K B , Etherington , J , Riffel , R , Mallmann , N D , Zheng , Z , Argudo-Fernández , M , Lian , J , Bershady , M A , Bundy , K , Drory , N , Law , D R , Yan , R , Wake , D , Weijmans , A-M , Bizyaev , D , Brownstein , J R , Lane , R R , Maiolino , R , Masters , K L , Merrifield , M R , Nitschelm , C , Pan , K , Roman-Lopes , A , Storchi-Bergmann , T & Schneider , D P 2017 , ' SDSS-IV MaNGA : spatially resolved star formation histories in galaxies as a function of galaxy mass and type ' , Monthly Notices of the Royal Astronomical Society , vol. 466 , no. 4 , pp. 4731-4758 .
dc.identifier.otherPURE: 248139588
dc.identifier.otherPURE UUID: 1ee53fc9-9c77-4e96-8265-3c955ad4f3d1
dc.identifier.otherBibCode: 2016arXiv161201546G
dc.identifier.otherScopus: 85019024530
dc.identifier.otherORCID: /0000-0002-5908-6852/work/40233457
dc.identifier.otherWOS: 000402849400070
dc.description.abstractWe study the internal gradients of stellar population properties within 1.5Re for a representative sample of 721 galaxies with stellar masses ranging between 109M⊙ to 1011.5M⊙ from the SDSS-IV MaNGA IFU 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 are positive (∼0.09dex/Re) pointing to "outside-in" progression of star formation, while late-type galaxies have negative light-weighted age gradients (∼−0.11dex/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 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.
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen
dc.rights© 2016, the Author(s). This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at /
dc.subjectGalaxies: formationen
dc.subjectGalaxies: evolutionen
dc.subjectGalaxies: elliptical and lenticular, cDen
dc.subjectGalaxies: spiralen
dc.subjectGalaxies: stellar contenten
dc.subjectGalaxies: star formationen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.titleSDSS-IV MaNGA : spatially resolved star formation histories in galaxies as a function of galaxy mass and typeen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.description.statusPeer revieweden

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