Journal article
P-MaNGA: full spectral fitting and stellar population maps from prototype observations
Monthly notices of the Royal Astronomical Society, Vol.449(1), pp.328-360
02/23/2015
DOI: 10.1093/mnras/stv301
Abstract
MaNGA (Mapping Nearby Galaxies at Apache Point Observatory) is a 6-yr SDSS-IV (Sloan Digital Sky Survey IV) survey that will obtain resolved spectroscopy from 3600 to 10 300 Å for a representative sample of over 10 000 nearby galaxies. In this paper, we derive spatially resolved stellar population properties and radial gradients by performing full spectral fitting of observed galaxy spectra from P-MaNGA, a prototype of the MaNGA instrument. These data include spectra for 18 galaxies, covering a large range of morphological type. We derive age, metallicity, dust, and stellar mass maps, and their radial gradients, using high spectral-resolution stellar population models, and assess the impact of varying the stellar library input to the models. We introduce a method to determine dust extinction which is able to give smooth stellar mass maps even in cases of high and spatially non-uniform dust attenuation. With the spectral fitting, we produce detailed maps of stellar population properties which allow us to identify galactic features among this diverse sample such as spiral structure, smooth radial profiles with little azimuthal structure in spheroidal galaxies, and spatially distinct galaxy sub-components. In agreement with the literature, we find the gradients for galaxies identified as early type to be on average flat in age, and negative (−0.15 dex/R
e) in metallicity, whereas the gradients for late-type galaxies are on average negative in age (−0.39 dex/R
e) and flat in metallicity. We demonstrate how different levels of data quality change the precision with which radial gradients can be measured. We show how this analysis, extended to the large numbers of MaNGA galaxies, will have the potential to shed light on galaxy structure and evolution.
Details
- Title: Subtitle
- P-MaNGA: full spectral fitting and stellar population maps from prototype observations
- Creators
- David M Wilkinson - University of PortsmouthClaudia Maraston - University of PortsmouthDaniel Thomas - University of PortsmouthLodovico Coccato - University of PortsmouthRita Tojeiro - University of St AndrewsMichele Cappellari - University of OxfordFrancesco Belfiore - University of CambridgeMatthew Bershady - University of Wisconsin–MadisonMike Blanton - University of PortsmouthKevin Bundy - The University of TokyoSabrina Cales - Yale UniversityBrian Cherinka - University of TorontoNiv Drory - University of PortsmouthEric Emsellem - Université Claude Bernard Lyon 1Hai Fu - University of IowaDavid Law - Space Telescope Science InstituteCheng Li - Max Planck SocietyRoberto Maiolino - University of CambridgeKaren Masters - University of PortsmouthChristy Tremonti - University of Wisconsin–MadisonDavid Wake - University of Wisconsin–MadisonEnci Wang - Max Planck SocietyAnne-Marie Weijmans - University of PortsmouthTing Xiao - Max Planck SocietyRenbin Yan - University of KentuckyKai Zhang - University of KentuckyDmitry Bizyaev - New Mexico State UniversityJonathan Brinkmann - New Mexico State UniversityKaren Kinemuchi - New Mexico State UniversityElena Malanushenko - New Mexico State UniversityViktor Malanushenko - New Mexico State UniversityDaniel Oravetz - New Mexico State UniversityKaike Pan - New Mexico State UniversityAudrey Simmons - New Mexico State University
- Resource Type
- Journal article
- Publication Details
- Monthly notices of the Royal Astronomical Society, Vol.449(1), pp.328-360
- DOI
- 10.1093/mnras/stv301
- ISSN
- 0035-8711
- eISSN
- 1365-2966
- Publisher
- Oxford University Press
- Language
- English
- Date published
- 02/23/2015
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199749102771
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