AO Vel: The role of multiplicity in the development of chemical peculiarities in late B-type stars

Abstract

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.

8 pages, 7 figures, 1 appendix. To be published in the Monthly Notices of the Royal Astronomical Society

References in corpus (3)

• Inhomogeneous surface distribution of chemical elements in the eclipsing binary AR Aur: A new challenge for our understanding of HgMn stars
• Evolution of magnetic fields in stars across the upper main sequence: I. Catalogue of magnetic field measurements with FORS1 at the VLT
• A refined analysis of the remarkable Bp star HR 6000

Cited by in corpus (5)

• Multiplicity of late-type B stars with HgMn peculiarity
• Multiplicity of rapidly oscillating Ap stars
• Spectroscopic variability and magnetic fields of HgMn stars
• V772 Cas: an ellipsoidal HgMn star in an eclipsing binary
• Orbit of the Mercury-Manganese binary 41 Eridani