ICATE 21876
INSTITUTO DE CIENCIAS ASTRONOMICAS, DE LA TIERRA Y DEL ESPACIO
Unidad Ejecutora - UE
artículos
Título:
AOVel: the role of multiplicity in the development of chemical peculiarities in late B-type stars
Autor/es:
GONZÁLEZ, J.F.; HUBRIG, S.; CASTELLI, F.
Revista:
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Año: 2010 vol. 402 p. 2539 - 2547
ISSN:
0035-8711
Resumen:
We present high-resolution, high signal-to-noise UVES spectra
of AOVel, a quadruple system containing an eclipsing BpSi star. From
these observations, we reconstruct the spectra of the individual
components and perform an abundance analysis of all four stellar
members. We found that all components are chemically peculiar with
different abundance patterns. In particular, the two less massive stars
show typical characteristics of HgMn stars. The two most massive stars
in the system show variable line profiles indicating the presence of
chemical spots. Given the youth of the system and the notable chemical
peculiarities of their components, this system could give important
insights in the origin of chemical anomalies.
Based on observations obtained at the European Southern Observatory,
Paranal, Chile, ESO programmes 076.D-0169(A) and 072.D-0235(B).
