Dynamical Masses and Radii of Four White Dwarf Stars

Details Dynamical Masses and Radii of Four White Dwarf Stars Dynamical Masses and Radii of Four White Dwarf Stars

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007hst..prop11301n&link_type=abstract

HST Proposal ID #11301. Cycle 16

Physics

Scientific paper

This proposal uses the FGS1r in TRANS mode to resolve a pair of double degenerate binary systems WD1639+153 and WD 1818+26 in order to determine their orbital elements. In addition, the binaries and several nearby field stars are observed by FGS1r in POS mode to establish the local inertial reference frame of each binary, as well as its parallax and proper motion. This will allow for a direct measurement of the distance and radius of each of the four WD stars. When combined with the orbital elements, this leads to a dynamical mass measurement for each WD, and a four calibration points of the WD mass-radius relation.;

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