Evolutionary Status of Late-type Contact Binaries: Case of a 1.2+1 M ⊙ Binary
Author: Stępień, Kazimierz
Source: Astrophysics and Space Science, Volume 304, Numbers 1-4, August 2006 , pp. 81-84(4)
Abstract:It is argued that typical W UMa-type stars are old, advanced evolutionary objects, similar to Algols, in the sense that they are past mass exchange resulting in a mass ratio inversion. Their secondaries are oversized due to depletion of hydrogen, and in many cases they possess small helium cores. An alternative evolutionary scenario leading to such a configuration is presented. Differences between the evolution of binaries with the initial mass ratio far and close to unity are discussed.
Document Type: Research article
Publication date: 2006-08-01