Computer Science
Scientific paper
Aug 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997esasp.402..371v&link_type=abstract
Proceedings of the ESA Symposium `Hipparcos - Venice '97', 13-16 May, Venice, Italy, ESA SP-402 (July 1997), p. 371-374
Computer Science
1
Scientific paper
The Hipparcos satellite has measured trigonometric parallaxes for 20 white dwarfs. With the exception of one each of the spectral types DZ, DC, DB, DQ, the majority are of spectral type DA. We compare the parallaxes with the most recent ground-based determinations. From a spectroscopic analysis of new optical observations we have determined atmospheric parameters T_(eff) and log(g). From the angular diameters and the parallaxes radii are obtained, and masses are calculated via the spectroscopic log(g). These data are used to test the theoretical mass-radius relation.
Allard Nicole
Koester Detlev
Schmidt Harry
Vauclair Gerard
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