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The age-metallicity structure of the Milky Way disc with APOGEE

Published online by Cambridge University Press:  02 August 2018

J. Ted Mackereth Open the ORCID record for J. Ted Mackereth [Opens in a new window] ,
Jo Bovy ,
Ricardo P. Schiavon  and
the SDSS-IV/APOGEE Collaboration
J. Ted Mackereth
Affiliation:
Astrophysics Research Institute, Liverpool John Moores University, 146 Brownlow Hill, Liverpool, L3 5RF, United Kingdom email: J.E.Mackereth@2011.ljmu.ac.uk
Jo Bovy
Affiliation:
Astronomy and Astrophysics Department, University of Toronto, 50 George Street, Toronto, ON M5S 3H4, Canada email: bovy@astro.utoronto.ca
Ricardo P. Schiavon
Affiliation:
Astrophysics Research Institute, Liverpool John Moores University, 146 Brownlow Hill, Liverpool, L3 5RF, United Kingdom email: J.E.Mackereth@2011.ljmu.ac.uk
the SDSS-IV/APOGEE Collaboration
Affiliation:
Astrophysics Research Institute, Liverpool John Moores University, 146 Brownlow Hill, Liverpool, L3 5RF, United Kingdom email: J.E.Mackereth@2011.ljmu.ac.uk Astronomy and Astrophysics Department, University of Toronto, 50 George Street, Toronto, ON M5S 3H4, Canada email: bovy@astro.utoronto.ca
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Abstract

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The best way to trace back the history of star formation and mass assembly of the Milky Way disc is by combining chemical compositions, ages and phase-space information for a large number of disc stars. With the advent of large surveys of the stellar populations of the Galaxy, such data have become available and can be used to pose constraints on sophisticated models of galaxy formation. We use SDSS-III/APOGEE data to derive the first detailed 3D map of stellar density in the Galactic disc as a function of age, [Fe/H] and [α/Fe]. We discuss the implications of our results for the formation and evolution of the disc, presenting new constraints on the disc structural parameters, stellar radial migration and disc flaring. We also discuss how our results constrain the inside out formation of the disc, and determine the surface-mass density contributions at the solar radius for mono-age, mono-[Fe/H] populations.

Keywords

Galaxy: discGalaxy: formationGalaxy: evolutionGalaxy: structureGalaxy: fundamental parameters
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S334: Rediscovering our Galaxy , July 2017 , pp. 265 - 268
Copyright
Copyright © International Astronomical Union 2018 

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