An analysis of the bright white dwarf CD - 38 deg 10980

Details An analysis of the bright white dwarf CD - 38 deg 10980 An analysis of the bright white dwarf CD - 38 deg 10980

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...293..294h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 293, June 1, 1985, p. 294-302. Research supported by the Natural Sciences a

Astronomy and Astrophysics

Astrophysics

34

Spectrum Analysis, Stellar Luminosity, Stellar Spectra, Ultraviolet Spectra, White Dwarf Stars, Astrometry, Balmer Series, Lyman Alpha Radiation, Spectral Energy Distribution, Stellar Atmospheres, Stellar Mass, Stellar Models, Stellar Temperature

Scientific paper

The bright DA white dwarf CD - 38 deg 10980 is comprehensively analyzed using all available data. Detailed comparisons of the overall energy distribution and Lyman-alpha and Balmer profiles are made with theoretical predictions based on a homogeneous grid of model atmospheres. These comparisons yield a consistent, well-defined effective temperature and surface gravity for this star of 24,700 + or - 250 K and log g = 7.95 + or - 0.15, respectively. A new gravitational redshift of 28.4 + or - 4.8 km/s is derived from an IUE high-dispersion spectrum. Conclusions regarding the mass and radius of CD - 38 deg 10980 are also presented.

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