Evolution of intermediate and low mass binary systems

Details Evolution of intermediate and low mass binary systems Evolution of intermediate and low mass binary systems

Mar 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010newar..54...45e&link_type=abstract

New Astronomy Reviews, Volume 54, Issue 3-6, p. 45-49.

Astronomy and Astrophysics

Astronomy

1

Scientific paper

There are a number of binaries, fairly wide and with one or even two evolved giant components, that do not agree very well with conventional stellar evolution: the secondaries are substantially larger (‘oversized’) than they should be because their masses are quite low compared with the primaries. I discuss the possibility that these binaries are former triples, in which a merger has occurred fairly recently in a short-period binary sub-component.Some mergers are expected, and may follow a phase of contact evolution. I suggest that in contact there is substantial transfer of luminosity between the components due to differential rotation, of the character observed by helioseismology in the Sun’s surface convection zone.

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