Mass distribution of DA white dwarfs and atmospheric parameters of ZZ Ceti stars

Details Mass distribution of DA white dwarfs and atmospheric parameters of ZZ Ceti stars Mass distribution of DA white dwarfs and atmospheric parameters of ZZ Ceti stars

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...132..195w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 132, no. 1, March 1984, p. 195-202.

Astronomy and Astrophysics

Astrophysics

123

Stellar Mass, Variable Stars, White Dwarf Stars, Mass Distribution, Stellar Atmospheres, Stellar Color, Stellar Models, Stellar Spectrophotometry, Stellar Temperature

Scientific paper

A number of investigations and studies have recently been concerned with the variable ZZ Ceti stars. Dolez et al. (1983) have pointed out that further progress depends now on better statistics and more reliable determination of the effective temperatures in and around the instability strip. The most extensive study made to date in this respect is that by Greenstein (1982). Oke et al. (1983) have demonstrated that the use of broad band indices derived from multichannel spectrophotometry (MCSP) data according to Schulz's method (1977) represents also a powerful approach in the case of DB white dwarfs. The present investigation has, therefore, the objective to repeat and extend Greenstein's study for the ZZ Ceti stars and also all 'neighboring' DA white dwarfs with MCSP data in the temperature range from 16,000 to 8,000 K. New temperatures and surface gravities for 70 DA stars, including 13 ZZ Ceti variables, are derived on the basis of improved model atmospheres.

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