Detailed chemical abundances of distant RR Lyrae stars in the Virgo Stellar Stream

Autor:	Duffau, S., Sbordone, L., Vivas, A. K., Hansen, C. J., Zoccali, M., Catelan, M., Minniti, D., Grebel, E. K.
Rok vydání:	2016
Předmět:	Astrophysics - Astrophysics of Galaxies
Druh dokumentu:	Working Paper
Popis:	We present the first detailed chemical abundances for distant RR Lyrae stars members of the Virgo Stellar Stream (VSS), derived from X-Shooter medium-resolution spectra. Sixteen elements from carbon to barium have been measured in six VSS RR Lyrae stars, sampling all main nucleosynthetic channels. For the first time we will be able to compare in detail the chemical evolution of the VSS progenitor with those of Local Group dwarf spheroidal galaxies (LG dSph) as well as the one of the smooth halo. Comment: 4 pages, 3 figures, to appear in the proceedings of the conference RRL2015 High-Precision Studies of RR Lyrae Stars
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1603.07191 Zobrazit plný text záznamu View this record from Arxiv