Lanning 14, a new DO white dwarf - Spectrophotometry and atmospheric parameters

Details Lanning 14, a new DO white dwarf - Spectrophotometry and atmospheric parameters Lanning 14, a new DO white dwarf - Spectrophotometry and atmospheric parameters

Sep 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981aj.....86.1384l&link_type=abstract

Astronomical Journal, vol. 86, Sept. 1981, p. 1384-1386. Research supported by the Ministere de l'Education du Quebec and Alfre

Astronomy and Astrophysics

Astronomy

5

O Stars, Stellar Atmospheres, Stellar Spectrophotometry, White Dwarf Stars, Absorption Spectra, Stellar Spectra

Scientific paper

Optical spectrophotometric observations are presented and analyzed for Lanning 14, which was recently classified as a DO white dwarf and has one of the strongest He II 4868 absorption lines of any known star, with strong He Bracket lines and weak He I. An effective temperature of 55,000 plus or minus 2500 K, log g near 8, and He/H ratio equal to or greater than 100, have been derived by means of a new grid of hot, high-gravity, mixed-composition models. It is concluded that Lanning 14 is both hotter and more helium-rich than the prototype DO star HZ 21.

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