Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cnoc.conf...42r&link_type=abstract
The Second National Conference on Astrophysics of Compact Objects, held in Bologna (Italy), September 19 - 21, 2001, p. 42
Astronomy and Astrophysics
Astrophysics
Scientific paper
Gravitational wave emission is considered to be the driving force for the evolution of short-period cataclysmic binary stars, making them a potential test for the validity of General Relativity. In spite of continuous refinements of the physical description, a 10% mismatch exists between the theoretical minimum period and the short-period cut- off observed in the period distribution for cataclysmic variable binaries. A possible explanation for this mismatch was associated with the use of the Roche model. We here derive a value for the minimum period of cataclysmic variable binaries on the basis of using self- consistent, numerically constructed sequences of hydrostatic models of binary stars. The results obtained are compared with those coming from the Roche model and indicate that the latter is indeed very good, with deviations from the numerical solution which are of a few percent at most. Our results therefore suggest that additional sources of angular momentum loss or alternative explanations need to be considered in order to justify the mismatch.
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