White Dwarf Stars in Visual Binaries: Testing Stellar Degeneracy

Details White Dwarf Stars in Visual Binaries: Testing Stellar Degeneracy White Dwarf Stars in Visual Binaries: Testing Stellar Degeneracy

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7398s&link_type=abstract

HST Proposal ID #7398

Physics

Hst Proposal Id #7398 Hot Stars And Stellar Corpses

Scientific paper

White dwarfs, the final evolutionary endpoints for most stars, are important to our understanding of stellar evolution and to our testing of critical aspects of fundamental physics. Stellar degeneracy, in particular, underlies much of our understanding of phenomena involving stellar evolution, neutron stars, and white dwarfs in more exotic binaries. However, our observational confirmation of Chandrasekhar's theory rests on four points, three representing the radii of white dwarfs in visual binaries with separations great enough to determine the white dwarf characteristics from the ground, and a fourth with a radius derived from previous HST observations. The results demonstrate that the theory of degeneracy barriers to gravitational collapse has been tested neither extensively or particularly successfully. We propose to increase the number of observed points from 4 to 6 by adding the binary white dwarf G107-70, and to greatly improve the error estimates of Procyon B, one of best known binary systems.

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