Computer Science
Scientific paper
Jul 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8181b&link_type=abstract
HST Proposal ID #8181
Computer Science
Hst Proposal Id #8181 Hot Stars
Scientific paper
Space-based UV and EUV surveys have revealed a new population of detached binary systems, comprising main-sequence primaries that dominate the optical light, with hot white-dwarf secondaries that are revealed only at short wavelengths. We propose a snapshot survey in order to search for resolved, Sirius-like systems among these candidates. Subsequent determinations of the visual orbits of the resolved binaries with HST will provide dynamical measurements of the white- dwarf masses. Since there are only a very few dynamically determined white-dwarf masses at present, this programme could lead to a doubling or tripling of the number known. As a result, this sample will yield direct observational data on the white dwarf mass-radius and initial-mass ash final-mass relations and provide important tests of the respective theoretical models.
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