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APOGEE: the Sloan Digital Sky Survey Apache Point Observatory Galactic Evolution Experiment. Insights into the Galactic Disk: A Review

Published online by Cambridge University Press:  02 August 2018

Jon A. Holtzman Open the ORCID record for Jon A. Holtzman [Opens in a new window] ,
Sten Hasselquist  and
the SDSS-IV/APOGEE-2 collaboration
Jon A. Holtzman
Affiliation:
Department of Astronomy, New Mexico State University Box 30001/MSC 4500 Las Cruces NM 88003, USA email: holtz@nmsu.edu, sten@nmsu.edu
Sten Hasselquist
Affiliation:
Department of Astronomy, New Mexico State University Box 30001/MSC 4500 Las Cruces NM 88003, USA email: holtz@nmsu.edu, sten@nmsu.edu
the SDSS-IV/APOGEE-2 collaboration
Affiliation:
Department of Astronomy, New Mexico State University Box 30001/MSC 4500 Las Cruces NM 88003, USA email: holtz@nmsu.edu, sten@nmsu.edu
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Abstract

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The SDSS Apache Point Observatory Galactic Evolution Experiment (APOGEE) has collected high resolution near-IR spectra for several hundred thousand stars throughout the Milky Way. We review some of the results related to chemistry of stars in the disk, where APOGEE has a particular advantage by virtue of being able to work in more obscured areas. The ability to measure carbon and nitrogen abundances in giants in the near-IR provides insight into stellar ages. We summarize results on the variation of mean metallicity, metallicity distribution functions, and the [α/Fe]–[Fe/H] relation across the Galactic disk, as well as results on the structural parameters in mono-abundance populations. Many of these results suggest that radial migration has played a significant role in the Galactic disk. It may be possible to disentangle radial mixing using multi-element abundance patterns.

Keywords

surveysstars: abundancesGalaxy: abundancesGalaxy: stellar content
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S334: Rediscovering our Galaxy , July 2017 , pp. 101 - 108
Copyright
Copyright © International Astronomical Union 2018 

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