Observations of the strong ultraviolet absorptions in the spectrum of the DC white dwarf G218-8

Details Observations of the strong ultraviolet absorptions in the spectrum of the DC white dwarf G218-8 Observations of the strong ultraviolet absorptions in the spectrum of the DC white dwarf G218-8

Sep 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...248l.129w&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 248, Sept. 15, 1981, p. L129-L132.

Astronomy and Astrophysics

Astrophysics

20

Absorption Spectra, Carbon, Stellar Spectra, Ultraviolet Spectra, White Dwarf Stars, Abundance, Helium, Iue, Line Spectra, Stellar Atmospheres, Stellar Temperature, Visible Spectrum

Scientific paper

The spectrum of the 14th magnitude DC white dwarf G218-8 (EG 245) is described. In the visible spectral region the star has been observed with the IIDS scanner attached to the Kitt Peak National Observatory 2.1 m telescope, where it shows a featureless spectrum. However, the ultraviolet observations using the IUE satellite show that strong absorption lines attributable to neutral carbon are present. G218-8 has an effective temperature near 11,500 K and a helium dominated atmosphere with a carbon-to-helium abundance ratio less than or approximately equal to 0.005.

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