On the possible origin of Boo stars
Received 12 March 1996 / Accepted 6 September 1996
We discuss a new approach to the problem of the origin of Boo stars. It is proposed that at least some of these stars may arise from contact binary systems of W UMa type. Simple estimations based on this supposition can account for the present-day number of Boo stars in the solar neighbourhood, their masses and spectral classes. It is also important that the proposed scenario does not exclude circumstellar shell formation, which is responsible for the chemical peculiarities of Boo stars.
Key words: stars: binaries; close stars: chemically peculiar stars: evolution
© European Southern Observatory (ESO) 1997
Online publication: June 30, 1998