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Exploring the Galactic Warp Through Asymmetries in the Kinematics of the Galactic Disk
Xinlun Cheng, Borja Anguiano, Steven R. Majewski +10
Previous analyses of large databases of Milky Way stars have revealed the stellar disk of our Galaxy to be warped and that this imparts a strong signature on the kinematics of star…
Discovery of a large population of Nitrogen-Enhanced stars in the Magellanic Clouds
José G. Fernández-Trincado, Timothy C. Beers, Dante Minniti +7
We report the APOGEE-2S discovery of a unique collection of nitrogen-enhanced mildly metal-poor giant stars, peaking at [Fe/H] with no carbon enrichment, toward the…
Open Cluster Chemical Homogeneity Throughout the Milky Way
Vijith Jacob Poovelil, G. Zasowski, S. Hasselquist +10
The chemical homogeneity of surviving stellar clusters contains important clues about interstellar medium (ISM) mixing efficiency, star formation, and the enrichment history of the…
Cool stars in the Galactic Center as seen by APOGEE: M giants, AGB stars and supergiant stars/candidates
M. Schultheis, A. Rojas-Arriagada, K. Cunha +11
The Galactic Center region, including the nuclear disk, has until recently been largely avoided in chemical census studies because of extreme extinction and stellar crowding. Makin…
Exploring the stellar age distribution of the Milky Way Bulge using APOGEE
Sten Hasselquist, Gail Zasowski, Diane K. Feuillet +20
We present stellar age distributions of the Milky Way (MW) bulge region using ages for 6,000 high-luminosity (), metal-rich () bulge stars…
The age-chemical abundance structure of the Galactic disc II: -dichotomy and thick disc formation
Jianhui Lian, Daniel Thomas, Claudia Maraston +9
We extend our previous work on the age-chemical abundance structure of the Galactic outer disc to the inner disc (4 < r < 8 kpc) based on the SDSS/APOGEE survey. Different from the…
How Many Components? Quantifying the Complexity of the Metallicity Distribution in the Milky Way Bulge with APOGEE
A. Rojas-Arriagada, G. Zasowski, M. Schultheis +14
We use data of 13,000 stars from the SDSS/APOGEE survey to study the shape of the bulge MDF within the region and , and spatially constr…
The Milky Way bar and bulge revealed by APOGEE DR16 and Gaia EDR3
A. B. A. Queiroz, C. Chiappini, A. Perez-Villegas +23
We investigate the inner regions of the Milky Way with a sample of unprecedented size and coverage thanks to APOGEE DR16 and Gaia EDR3 data. Our inner Galactic sample has more than…
The Close Binary Fraction as a Function of Stellar Parameters in APOGEE: A Strong Anti-Correlation With Abundances
Christine N. Mazzola, Carles Badenes, Maxwell Moe +20
We use observations from the APOGEE survey to explore the relationship between stellar parameters and multiplicity. We combine high-resolution repeat spectroscopy for 41,363 dwarf…
The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Large-scale Structure Catalogs for Cosmological Analysis
Ashley J. Ross, Julian Bautista, Rita Tojeiro +53
We present large-scale structure catalogs from the completed extended Baryon Oscillation Spectroscopic Survey (eBOSS). Derived from Sloan Digital Sky Survey (SDSS) -IV Data Release…
The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Baryon acoustic oscillations with Lyman- forests
Hélion du Mas des Bourboux, James Rich, Andreu Font-Ribera +36
We present a measurement of baryonic acoustic oscillations (BAO) from Lyman- (Ly) absorption and quasars at an effective redshift using the complete extended Baryoni…
The Chemical Compositions of Accreted and {\it in situ} Galactic Globular Clusters According to SDSS/APOGEE
Danny Horta, Ricardo P. Schiavon, J. Ted Mackereth +16
Studies of the kinematics and chemical compositions of Galactic globular clusters (GCs) enable the reconstruction of the history of star formation, chemical evolution, and mass ass…
Close Binary Companions to APOGEE DR16 Stars: 20,000 Binary-star Systems Across the Color-Magnitude Diagram
Adrian M. Price-Whelan, David W. Hogg, Hans-Walter Rix +20
Many problems in contemporary astrophysics---from understanding the formation of black holes to untangling the chemical evolution of galaxies---rely on knowledge about binary stars…