Model atmospheres for cool hydrogen-rich white dwarfs

Details Model atmospheres for cool hydrogen-rich white dwarfs Model atmospheres for cool hydrogen-rich white dwarfs

Apr 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976a%26as...24...95w&link_type=abstract

Astronomy and Astrophysics Supplement Series, vol. 24, Apr. 1976, p. 95-110.

Astronomy and Astrophysics

Astrophysics

12

Atmospheric Models, Stellar Models, White Dwarf Stars, Abundance, Atmospheric Composition, Line Spectra, Stellar Spectra, Thermodynamic Equilibrium

Scientific paper

A total of fifteen model atmospheres and calculated fluxes between 1000 and 50,000 A for hydrogen-rich white dwarfs (spectral type DA) with effective temperatures ranging from 7000 to 12,000 K are presented for log g values of 8.0 and 8.5. All the models are computed on the assumptions of hydrostatic equilibrium, a plane-parallel atmosphere, an ideal gas, and local thermodynamic equilibrium. All but one have solar helium and CNO abundances; the heavy-element abundances are reduced to 0.01 of the solar values, except in two cases having solar abundances for all the elements. In one of these two exceptions, the line blanketing due to the 27 strongest metal lines is taken into account. One model consists of pure hydrogen; another has a temperature stratification; and a third is not Balmer-line blanketed, since only continuous absorption processes are taken into account.

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