The discontinuity near 1600 A in the spectra of DA white dwarfs

Details The discontinuity near 1600 A in the spectra of DA white dwarfs The discontinuity near 1600 A in the spectra of DA white dwarfs

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...284l..43w&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 284, Sept. 15, 1984, p. L43-L46.

Astronomy and Astrophysics

Astronomy

9

Stellar Spectra, Ultraviolet Astronomy, White Dwarf Stars, Iue, Spectral Energy Distribution, Stellar Temperature

Scientific paper

Ultraviolet spectroscopic observations of two relatively cool DA white dwarfs, L481 - 60 (= WD 1544 - 37) and BPM 1266 ( = WD 2105 - 82), with the International Ultraviolet Explorer (IUE) satellite show a strong drop in their spectral energy distributions below 1600 A. Published model atmospheres and thier visual spectra suggest that these two stars have effective temperatures in the vicinity of 9,000-10,000 K, and it is proposed that the 1600 A feature could be due to the 342(1S) 3s2(1S) photoionization edge of Mg I.

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