Computer Science
Scientific paper
Jul 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003hst..prop.9769h&link_type=abstract
HST Proposal ID #9769
Computer Science
Hst Proposal Id #9769 Hot Stars
Scientific paper
HS1136+6646 is a recently discovered close-binary system consisting of a hot {Teff 120, 000 K} DAO white dwarf and a K7V main sequence companion. It is unique in being a relatively bright, nearby example of both a very young post-common envelope system and a pre-cataclysmic variable system. Although the K star component of HS1136+6646 has now been well studied from the ground, the white dwarf can only be effectively studied at UV wavelengths from space. We propose STIS observations of HS1136+6646 which focus specifically on the nature of the white dwarf, i.e., its mass, temperature, age, photospheric composition and possible magnetic field. High-dispersion echelle spectra, taken at quadrature of the 0.83607 day orbital period of the system will provide an accurate determination of the gravitational redshift of the white dwarf.
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