DA white dwarf effective temperatures determined from IUE Lyman-alpha profiles

Details DA white dwarf effective temperatures determined from IUE Lyman-alpha profiles DA white dwarf effective temperatures determined from IUE Lyman-alpha profiles

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...306..629h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 306, July 15, 1986, p. 629-641. NSERC-supported research.

Astronomy and Astrophysics

Astronomy

79

Iue, Lyman Alpha Radiation, Stellar Spectra, Stellar Temperature, Ultraviolet Astronomy, White Dwarf Stars, Stellar Atmospheres, Stellar Magnitude

Scientific paper

The Lyman-alpha profiles of 12 DA white dwarfs have been obtained with the International Ultraviolet Explorer Satellite. Analysis of these profiles provides an improved, uniform, and relatively bias-free measure of effective temperature for these stars over the range 20,000-60,000 K. Simultaneous estimates of surface gravity yield a mean gravity of log g = 7.96 for the entire sample, with the hottest stars tending to have the lowest gravities. A significant exception to this trend occurs in the case of the gravitation of HZ 43. An important by-product of this work has been the determination of a correction to IUE fluxes over the 1150-1350 A range.

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