Chemical abundance analysis of the Be star HD 171054
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
|---|---|
| Data(s) |
20/10/2012
20/10/2012
2011
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| Resumo |
In this work the results of a spectroscopic study of the southern field narrow-line Be star HD 171054 are presented. High dispersion and signal-to-noise ratio spectra allowed the estimation of the fundamental photospheric parameters such as the projected rotational velocity, effective temperature and superficial gravity from non-LTE stellar atmosphere models. From these parameters and microturbulence, the abundances of He, C, N, O, Mg, Al and Si for this object are estimated. Results show that C is depleted whereas N is overabundant compared with the sun and OB stars in the solar vicinity. Oxygen and helium are close to the solar value. Magnesium is down by 0.43 dex and aluminium and silicon are overabundant. (C) 2010 Elsevier B.V. All rights reserved. Brazilian Agency CNPq[307095/2008-8] Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Brazilian Agency CNPq[1998/10138-8] |
| Identificador |
NEW ASTRONOMY, v.16, n.5, p.307-310, 2011 1384-1076 http://producao.usp.br/handle/BDPI/29570 10.1016/j.newast.2010.09.003 |
| Idioma(s) |
eng |
| Publicador |
ELSEVIER SCIENCE BV |
| Relação |
New Astronomy |
| Direitos |
restrictedAccess Copyright ELSEVIER SCIENCE BV |
| Palavras-Chave | #Line profile #Emission-line #Fundamental parameters #Abundance #Spectroscopy #MODEL STELLAR ATMOSPHERES #B-STARS #EVOLUTION #NITROGEN #SAMPLE #CARBON #Astronomy & Astrophysics |
| Tipo |
article original article publishedVersion |
