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Stellar multiplicity and stellar rotation: Insights from APOGEE
Christine Mazzola Daher, Carles Badenes, Jamie Tayar +18
We measure rotational broadening in spectra taken by the Apache Point Observatory Galactic Evolution Experiment (APOGEE) survey to characterise the relationship between stellar mul…
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 Most Metal-poor Stars in Omega Centauri (NGC 5139)
Christian I. Johnson, Andrea K. Dupree, Mario Mateo +3
The most massive and complex globular clusters in the Galaxy are thought to have originated as the nuclear cores of now tidally disrupted dwarf galaxies, but the connection between…
Stellar Multiplicity Meets Stellar Evolution And Metallicity: The APOGEE View
Carles Badenes, Christine Mazzola, Todd A. Thompson +21
We use the multi-epoch radial velocities acquired by the APOGEE survey to perform a large scale statistical study of stellar multiplicity for field stars in the Milky Way, spanning…
Light and Heavy Element Abundance Variations in the Outer Halo Globular Cluster NGC 6229
Christian I. Johnson, Nelson Caldwell, R. Michael Rich +1
NGC 6229 is a relatively massive outer halo globular cluster that is primarily known for exhibiting a peculiar bimodal horizontal branch morphology. Given the paucity of spectrosco…
Detailed Chemical Abundances in the r-Process-Rich Ultra-Faint Dwarf Galaxy Reticulum 2
Ian U. Roederer, Mario Mateo, John I. Bailey +10
The ultra-faint dwarf galaxy Reticulum 2 (Ret 2) was recently discovered in images obtained by the Dark Energy Survey. We have observed the four brightest red giants in Ret 2 at hi…