CHEMICAL CARTOGRAPHY WITH APOGEE: METALLICITY DISTRIBUTION FUNCTIONS AND THE CHEMICAL STRUCTURE OF THE MILKY WAY DISK

著者: 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 Pérez, Léo Girardi, Paul Harding, Fred R. Hearty, Jennifer 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 - The Astrophysical Journal 2015 被引用: 613

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 z 2 < | | 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