Atmospheric parameters and mass distribution of DA-white dwarfs

Details Atmospheric parameters and mass distribution of DA-white dwarfs Atmospheric parameters and mass distribution of DA-white dwarfs

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..96....1g&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 96, no. 1, Oct. 1983, p. 1-23.

Astronomy and Astrophysics

Astrophysics

15

Mass Distribution, Stellar Atmospheres, Stellar Gravitation, Stellar Mass, Stellar Temperature, White Dwarf Stars, Error Analysis, Radii, Stellar Evolution

Scientific paper

The method of effective temperature Teff and log g determination for DA-white dwarfs by KSW model atmospheres is analyzed. The existence of systematic errors in log g determination, leading to lower mass values for Teff > 15000K, is demonstrated. With due account to log g corrections, masses for 355 DA-dwarfs were evaluated. The influence of the effects of observational selection on mass distribution has been considered. These effects are connected with the fact that such selection on effects favour discovery of white dwarfs of low masses. The distribution obtained is characterized by the average mass of ≡0.75 M_sun; and the distribution width of ≡0.20 M_sun;.

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