Detailed abundances in stars belonging to ultra-faint dwarf spheroidal galaxies

P. François, L. Monaco, S. Villanova, M. Catelan, P. Bonifacio, M. Bellazzini, C. Moni Bidin, G. Marconi, D. Geisler, L. Sbordone

Resultado de la investigación: Contribución a los tipos de informe/libroContribución a la conferenciarevisión exhaustiva

4 Citas (Scopus)

Resumen

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.

Idioma originalInglés
Título de la publicación alojadaOrigin of Matter and Evolution of Galaxies 2011
Páginas460-462
Número de páginas3
DOI
EstadoPublicada - 2012
EventoInternational Symposium on Origin of Matter and Evolutions of Galaxies 2011, OMEG 2011 - Wako, Japón
Duración: 14 nov 201117 nov 2011

Serie de la publicación

NombreAIP Conference Proceedings
Volumen1484
ISSN (versión impresa)0094-243X
ISSN (versión digital)1551-7616

Otros

OtrosInternational Symposium on Origin of Matter and Evolutions of Galaxies 2011, OMEG 2011
País/TerritorioJapón
CiudadWako
Período14/11/1117/11/11

Áreas temáticas de ASJC Scopus

  • Física y astronomía (todo)

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