期刊
NEW ASTRONOMY
卷 17, 期 4, 页码 458-468出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.newast.2011.11.004
关键词
Binaries; General-stars; statistics-white dwarfs
资金
- NASA [Y701296]
- NSF [AST 02-06115, AST0807919]
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [0807919] Funding Source: National Science Foundation
The secular stellar mass loss causes an amplification of the orbital separation in fragile, common proper motion, binary systems with separations of the order of 1000 A.U. In these systems, companions evolve as two independent coeval stars as they experience negligible mutual tidal interactions or mass transfer. We present models for how post-main sequence mass-loss statistically distorts the frequency distribution of separations in fragile binaries. These models demonstrate the expected increase in orbital separation resulting from stellar mass-loss, as well as a perturbation of associated orbital parameters. Comparisons between our models and observations resulting from the Luyten survey of wide visual binaries, specifically those containing MS and white-dwarf pairs, demonstrate a good agreement between the calculated and the observed angular separation distribution functions. (C) 2011 Elsevier B.V. All rights reserved.
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