The Milky Way Bulge Metallicity Distribution Function from DR14 APOGEE Results

Sobeck, Jennifer; Schultheis, Mathias; Zasowski, Gail; Cunha, Katia; Johnson, Jennifer; Hasselquist, Sten; Garcia Perez, A .E.
Referencia bibliográfica

American Astronomical Society, AAS Meeting #231, id.#424.03

Fecha de publicación:
1
2018
Número de autores
7
Número de autores del IAC
1
Número de citas
0
Número de citas referidas
0
Descripción
The view of the Milky Way bulge has evolved considerably over the past decade with recent findings of a multi-component metallicity distribution, the detection of a non-negligible fraction of younger stars and the occurrence of multiple star formation episodes. For more than 5 years, the Apache Point Observatory Galactic Evolution Experiment (APOGEE-1 and APOGEE-2) has performed a large-scale, high-resolution stellar spectroscopic survey of the Galaxy. With the use of near-infrared spectroscopy to penetrate dust-obscured regions, APOGEE is able to probe the full longitudinal and latitudinal extent of the bulge and is uniquely poised to answer questions about the Inner Galaxy. We present the metallicity results for the innermost regions of the Milky Way based on highly-accurate abundances from the latest SDSS DR14 data release. We relay the detection of metallicity gradients in this region as well as the presence of multiple populations of different median metallicity values.