Near-Field cosmology with RR Lyrae variable stars: A first view of substructure in the southern sky

Autor:	Duffau, S., Vivas, A. K., Navarrete, C., Catelan, M., Hajdu, G., Torrealba, G., Cortes, C., Belokurov, V., Koposov, S., Drake, A. J.
Rok vydání:	2016
Předmět:	Astrophysics - Astrophysics of Galaxies
Druh dokumentu:	Working Paper
Popis:	We present an update of a spectroscopic follow-up survey at low-resolution of a large number of RR Lyrae halo overdensity candidates found in the southern sky. The substructure candidates were identified in the RR Lyrae catalog of Torrealba et al. (2015) using Catalina Real-time Transient Survey (CRTS) data. Radial velocities and mean metallicities have been estimated for target stars in almost half of the original overdensities to assess their potential membership to coherent halo features. Comment: 2 pages, 1 figure, to appear in the proceedings of the conference RRL2015 High-Precision Studies of RR Lyrae Stars
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1607.01416 Zobrazit plný text záznamu View this record from Arxiv