Abundances, stellar parameters, and spectra from the SDSS-III/APOGEE survey

Jon A. Holtzman, Matthew Shetrone, Jennifer A. Johnson, Carlos Allende Prieto, Friedrich Anders, Brett Andrews, Timothy C. Beers, Dmitry Bizyaev, Michael R. Blanton, Jo Bovy, Ricardo Carrera, S. Drew Chojnowski, Katia Cunha, Daniel J. Eisenstein, Diane Feuillet, Peter M. Frinchaboy, Jessica Galbraith-Frew, Ana E.García Pérez, D. A. García-Hernández, Sten HasselquistMichael R. Hayden, Fred R. Hearty, Inese Ivans, Steven R. Majewski, Sarah Martell, Szabolcs Meszaros, Demitri Muna, David Nidever, Duy Cuong Nguyen, Robert W. O'Connell, Kaike Pan, Marc Pinsonneault, Annie C. Robin, Ricardo P. Schiavon, Neville Shane, Jennifer Sobeck, Verne V. Smith, Nicholas Troup, David H. Weinberg, John C. Wilson, W. M. Wood-Vasey, Olga Zamora, Gail Zasowski

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The SDSS-III/Apache Point Observatory Galactic Evolution Experiment (APOGEE) survey operated from 2011-2014 using the APOGEE spectrograph, which collects high-resolution (R ∼ 22,500), near-IR (1.51-1.70 μm) spectra with a multiplexing (300 fiber-fed objects) capability. We describe the survey data products that are publicly available, which include catalogs with radial velocity, stellar parameters, and 15 elemental abundances for over 150,000 stars, as well as the more than 500,000 spectra from which these quantities are derived. Calibration relations for the stellar parameters (Teff, log g, [M/H], [α/M]) and abundances (C, N, O, Na, Mg, Al, Si, S, K, Ca, Ti, V, Mn, Fe, Ni) are presented and discussed. The internal scatter of the abundances within clusters indicates that abundance precision is generally between 0.05 and 0.09 dex across a broad temperature range; it is smaller for some elemental abundances within more limited ranges and at high signal-to-noise ratio. We assess the accuracy of the abundances using comparison of mean cluster metallicities with literature values, APOGEE observations of the solar spectrum and of Arcturus, comparison of individual star abundances with other measurements, and consideration of the locus of derived parameters and abundances of the entire sample, and find that it is challenging to determine the absolute abundance scale; external accuracy may be good to 0.1-0.2 dex. Uncertainties may be larger at cooler temperatures (Teff < 4000K). Access to the public data release and data products is described, and some guidance for using the data products is provided.

Original languageEnglish (US)
Article number148
JournalAstronomical Journal
Issue number5
StatePublished - Nov 1 2015

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Holtzman, J. A., Shetrone, M., Johnson, J. A., Prieto, C. A., Anders, F., Andrews, B., Beers, T. C., Bizyaev, D., Blanton, M. R., Bovy, J., Carrera, R., Chojnowski, S. D., Cunha, K., Eisenstein, D. J., Feuillet, D., Frinchaboy, P. M., Galbraith-Frew, J., Pérez, A. E. G., García-Hernández, D. A., ... Zasowski, G. (2015). Abundances, stellar parameters, and spectra from the SDSS-III/APOGEE survey. Astronomical Journal, 150(5), [148]. https://doi.org/10.1088/0004-6256/150/5/148