no code implementations • 1 Feb 2021 • José G. Fernández-Trincado, Dante Minniti, Stefano O. Souza, Timothy C. Beers, Doug Geisler, Christian Moni Bidin, Sandro Villanova, Steven R. Majewski, Beatriz Barbuy, Angeles Pérez-Villegas, Lady Henao, María Romero-Colmenares, Alexandre Roman-Lopes, Richard R. Lane
We present the first high-resolution abundance analysis of the globular cluster VVV~CL001, which resides in a region dominated by high interstellar reddening towards the Galactic Bulge.
Astrophysics of Galaxies
no code implementations • 7 Dec 2020 • Sarah E. Dietz, Jinmi Yoon, Timothy C. Beers, Vinicius Placco, Young Sun Lee
We present a chemo-dynamical analysis of low-resolution ($R \sim 1300$) spectroscopy of stars from the AAOmega Evolution of Galactic Structure (AEGIS) survey, focusing on two key populations of carbon-enhanced metal-poor (CEMP) stars within the disk system of the Milky Way: a mildly prograde population ($L_z < 1000\,$kpc$\,$km$\,$s$^{-1}$) and a strongly prograde ($L_z > 1000\,$kpc$\,$km$\,$s$^{-1}$) population.
Astrophysics of Galaxies Solar and Stellar Astrophysics
no code implementations • 16 Nov 2020 • Guilherme Limberg, Silvia Rossi, Timothy C. Beers, Hélio D. Perottoni, Angeles Pérez-Villegas, Rafael M. Santucci, Yuri Abuchaim, Vinicius M. Placco, Young Sun Lee, Norbert Christlieb, John E. Norris, Michael S. Bessell, Sean G. Ryan, Ronald Wilhelm, Jaehyon Rhee, Anna Frebel
Additionally, a number of our newly identified DTGs are shown to be associated with at least two RPE stars each (DTG-2: 3, DTG-7: 2; DTG-27: 2).
Astrophysics of Galaxies Solar and Stellar Astrophysics
1 code implementation • 18 Sep 2015 • Jo Bovy, Hans-Walter Rix, Edward F. Schlafly, David L. Nidever, Jon A. Holtzman, Matthew Shetrone, Timothy C. Beers
We use data on 14, 699 red-clump stars from the APOGEE survey, covering 4 kpc <~ R <~ 15 kpc, to determine the structure of mono-abundance populations (MAPs)---stars in narrow bins in [a/Fe] and [Fe/H]---accounting for the complex effects of the APOGEE selection function and the spatially-variable dust obscuration.
Astrophysics of Galaxies
