Distances to White Dwarf Stars from HIPPARCOS

Details Distances to White Dwarf Stars from HIPPARCOS Distances to White Dwarf Stars from HIPPARCOS

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...189.7901p&link_type=abstract

American Astronomical Society, 189th AAS Meeting, #79.01; Bulletin of the American Astronomical Society, Vol. 28, p.1380

Astronomy and Astrophysics

Astronomy

6

Scientific paper

We will present the results of a HIPPARCOS campaign to determine the distances to a number of white dwarf stars and we will discuss their implications. For bright stars, HIPPARCOS parallaxes have uncertainties that approach 1 milliarcsecond and thus they are considerably more accurate than earlier, ground-based parallaxes. Our most important finding is that the positions of important white dwarf stars in the mass-radius diagram, used to test our understanding of stellar degeneracy, have not changed appreciably. As a result the well known puzzles associated with 40 Eri B are still with us. The HIPPARCOS results indicate that the important binary V 471 Tau is a member of the Hyades cluster. The calibration star G 191-B2B is only an optical companion to the star G 191-B2A; these two objects are at different distances. The analysis of HIPPARCOS data has been supported by a grant from NASA.

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