CHEMICAL CARTOGRAPHY with APOGEE: METALLICITY DISTRIBUTION FUNCTIONS and the CHEMICAL STRUCTURE of the MILKY WAY DISK

Michael R. Hayden, Jo Bovy, Jon A. Holtzman, David L. Nidever, Jonathan C. Bird, David H. Weinberg, Brett H. Andrews, Steven R. Majewski, Carlos Allende Prieto, Friedrich Anders, Timothy C. Beers, Dmitry Bizyaev, Cristina Chiappini, Katia Cunha, Peter Frinchaboy, D. A. García-Herńandez, Ana E. García Pé Rez, Léo Girardi, Paul Harding, Fred R. HeartyJennifer A. Johnson, Szabolcs Mészáros, Ivan Minchev, Robert O'Connell, Kaike Pan, Annie C. Robin, Ricardo P. Schiavon, Donald P. Schneider, Mathias Schultheis, Matthew Shetrone, Michael Skrutskie, Matthias Steinmetz, Verne Smith, John C. Wilson, Olga Zamora, Gail Zasowski

Research output: Contribution to journalArticle

212 Scopus citations

Abstract

Using a sample of 69,919 red giants from the SDSS-III/APOGEE Data Release 12, we measure the distribution of stars in the [/Fe] versus [Fe/H] plane and the metallicity distribution functions (MDFs) across an unprecedented volume of the Milky Way disk, with radius 3 < R < 15 kpc and height kpc. Stars in the inner disk (R < 5 kpc) lie along a single track in [/Fe] versus [Fe/H], starting with -enhanced, metal-poor stars and ending at [/Fe] ∼ 0 and [Fe/H] ∼ +0.4. At larger radii we find two distinct sequences in [/Fe] versus [Fe/H] space, with a roughly solar- sequence that spans a decade in metallicity and a high- sequence that merges with the low- sequence at super-solar [Fe/H]. The location of the high- sequence is nearly constant across the disk.

Original languageEnglish (US)
Article number132
JournalAstrophysical Journal
Volume808
Issue number2
DOIs
StatePublished - Aug 1 2015

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Hayden, M. R., Bovy, J., Holtzman, J. A., Nidever, D. L., Bird, J. C., Weinberg, D. H., Andrews, B. H., Majewski, S. R., Prieto, C. A., Anders, F., Beers, T. C., Bizyaev, D., Chiappini, C., Cunha, K., Frinchaboy, P., García-Herńandez, D. A., García Pé Rez, A. E., Girardi, L., Harding, P., ... Zasowski, G. (2015). CHEMICAL CARTOGRAPHY with APOGEE: METALLICITY DISTRIBUTION FUNCTIONS and the CHEMICAL STRUCTURE of the MILKY WAY DISK. Astrophysical Journal, 808(2), [132]. https://doi.org/10.1088/0004-637X/808/2/132