English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/6774
Compartir / Impacto:
Add this article to your Mendeley library MendeleyBASE
Citado 44 veces en Web of Knowledge®  |  Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar otros formatos: Exportar EndNote (RIS)Exportar EndNote (RIS)Exportar EndNote (RIS)
Título : New estimates of the contribution of Wolf-Rayet stellar winds to the Galactic 26Al
Autor : Palacios, Ana; Meynet, Georges; Vuissoz, Christel; Knödlseder, J.; Schaerer, Daniel; Cerviño, Miguel ; Mowlavi, Nami
Palabras clave : Nuclear reactions, nucleosynthesis, abundances
Stars: rotation
Galaxy: abundances
Stars: Wolf-Rayet
Stars: abundances
Fecha de publicación : 2005
Editor: EDP Sciences
Citación : A&A 429, 613-624 (2005)
Resumen: We present new yields of 26Al from Wolf-Rayet stellar winds based on rotating stellar models which account well for numerous observed properties of massive stars. We study the impacts on the yields of a change of initial mass, metallicity and initial rotation velocity. We also consider the effects of a change of mass loss rates during the Wolf-Rayet phase. We show that for surface rotation velocities during the core H-burning phase matching to the observed ones, the quantity of 26Al ejected by a star of a given initial mass and metallicity is roughly doubled when the effects of rotation are taken into account. The metallicity dependence of the yield is, on the other hand, very similar to that obtained from non-rotating models. We estimate that at least about 20% to 50% (e.g. ∼0.6-1.4 M_O) of the live 26Al detected in the Milky-Way originates from Wolf-Rayet stellar winds. We show the importance of a good knowledge of the present metallicity gradient and star formation rate in our galaxy for modeling both the variation of the 26Al surface density with the galactocentric distance and the global contribution of the Wolf-Rayet stellar winds to the present galactic mass of 26Al.
Descripción : 12 pages, 8 figures.-- arXiv:0409580 astro-ph pre-print supplied.-- Final full-text version of the paper available at: http://dx.doi.org/10.1051/0004-6361:20041757.
SIMBAD Objects associated to the paper available at: http://simbad.u-strasbg.fr/simbo.pl?bibcode=2005A%26A...429..613P.
URI : http://hdl.handle.net/10261/6774
DOI: 10.1051/0004-6361:20041757
ISSN: 1432-0746 (Online)
0004-6361 (Print)
Aparece en las colecciones: (IAA) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
0409580v1.pdf469,16 kBAdobe PDFVista previa
Mostrar el registro completo

NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.