@inproceedings{dc3a62517c214be7a4e53d8ea508db22,
title = "Detailed abundances in stars belonging to ultra-faint dwarf spheroidal galaxies",
abstract = "We report preliminary results concerning the detailed chemical composition of metal poor stars belonging to close ultra-faint dwarf galaxies (hereafter UfDSphs). The abundances have been determined thanks to spectra obtained with X-Shooter, a high efficiency spectrograph installed on one of the ESO VLT units. The sample of ultra-faint dwarf spheroidal stars have abundance ratios slightly lower to what is measured in field halo star of the same metallicity. We did not find extreme abundances in our Hercules stars as the one found by Koch for his 2 Hercules stars. The synthesis of the neutron capture elements Ba and Sr seems to originate from the same nucleosynthetic process in operation during the early stages of the galactic evolution.",
keywords = "Abundances, Dwarf galaxies, Stars",
author = "P. Fran{\c c}ois and L. Monaco and S. Villanova and M. Catelan and P. Bonifacio and M. Bellazzini and Bidin, {C. Moni} and G. Marconi and D. Geisler and L. Sbordone",
note = "Copyright: Copyright 2013 Elsevier B.V., All rights reserved.; International Symposium on Origin of Matter and Evolutions of Galaxies 2011, OMEG 2011 ; Conference date: 14-11-2011 Through 17-11-2011",
year = "2012",
doi = "10.1063/1.4763453",
language = "English",
isbn = "9780735410961",
series = "AIP Conference Proceedings",
pages = "460--462",
booktitle = "Origin of Matter and Evolution of Galaxies 2011",
}