Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...261l..87w&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 261, Oct. 15, 1982, p. L87-L89.
Astronomy and Astrophysics
Astrophysics
10
Absorption Spectra, Line Spectra, Stellar Spectrophotometry, Ultraviolet Spectra, White Dwarf Stars, Iue, Radiant Flux Density, Spectral Line Width, Stellar Models, Stellar Temperature, Wavelengths
Scientific paper
Low-resolution ultraviolet International Ultraviolet Explorer spectra of the southern white dwarf LB 3303 show the presence of the wavelength 1400 absorption feature reported by Greenstein in the spectrum of 40 Eri B. The equivalent width is 5.7 A, and the measured wavelength is 1394 A. A comparison of the ultraviolet fluxes with model atmospheres confirms that LB 3303 has an effective temperature near 16,000 K, as found earlier from visual wavelength data. There are still problems with the identification of this line. The star is not hot enough to explain the presence of Si IV, and the agreement with the spectrum of the H2 molecule is not convincing.
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