VVV CL001: Likely the Most Metal-poor Surviving Globular Cluster in the Inner Galaxy

Fernandez-Trincado, Jose G.; Minniti, Dante; Souza, Stefano O.; Beers, Timothy C.; Geisler, Doug; Bidin, Christian Moni; Villanova, Sandro; Majewski, Steven R.; Barbuy, Beatriz; Perez-Villegas, Angeles; Henao, Lady; Romero-Colmenares, Maria; Roman-Lopes, Alexandre; Lane, Richard R.

Abstract

We present the first high-resolution abundance analysis of the globular cluster VVV CL001, which resides in a region dominated by high interstellar reddening toward the Galactic bulge. Using H-band spectra acquired by the Apache Point Observatory Galactic Evolution Experiment, we identified two potential members of the cluster, and estimated from their Fe I lines that the cluster has an average metallicity of [Fe/H] = -2.45 with an uncertainty due to systematics of 0.24 dex. We find that the light-(N), alpha-(O, Mg, Si), and Odd-Z (Al) elemental abundances of the stars in VVV CL001 follo

Más información

Título según WOS: VVV CL001: Likely the Most Metal-poor Surviving Globular Cluster in the Inner Galaxy
Título de la Revista: ASTROPHYSICAL JOURNAL LETTERS
Volumen: 908
Número: 2
Editorial: IOP PUBLISHING LTD
Fecha de publicación: 2021
DOI:

10.3847/2041-8213/ABDF47

Notas: ISI