Evolution of Intermediate and Low Mass Binary Systems
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.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 886668
- Report Number(s):
- UCRL-CONF-216602; TRN: US200616%%1093
- Resource Relation:
- Journal Volume: 54; Journal Issue: 3-6; Conference: Presented at: A Life with Stars, Amsterdam, Netherlands, Aug 22 - Aug 26, 2005
- Country of Publication:
- United States
- Language:
- English
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