Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2010-01-04
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
8 pages, 7 figures, 1 appendix. To be published in the Monthly Notices of the Royal Astronomical Society
Scientific paper
10.1111/j.1365-2966.2009.16061.x
We present high-resolution, high signal-to-noise UVES spectra of AO Vel, 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 abundances patters. 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.
Castelli Fabio
González Javier Francisco
Hubrig Svetlana
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