The hot DO white dwarf HD 149499 B - Einstein redshift of a DB progenitor with carbon features

Details The hot DO white dwarf HD 149499 B - Einstein redshift of a DB progenitor with carbon features The hot DO white dwarf HD 149499 B - Einstein redshift of a DB progenitor with carbon features

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...265l..87s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 265, Feb. 15, 1983, p. L87-L91.

Astronomy and Astrophysics

Astronomy

15

Red Shift, Stellar Atmospheres, Ultraviolet Astronomy, White Dwarf Stars, Carbon Stars, Gravitational Effects, Iue, Photosphere, Stellar Evolution

Scientific paper

High-resolution IUE spectra of the hot DO white dwarf HD 149499B have been analyzed. The mass of the white dwarf needed to fit the measured gravitational redshift is 0.4-0.6 solar mass for a degenerate core composed of carbon based upon using a nonzero temperature mass-radius relation. The resonance doublet of C IV (1550 A) appears to be photospheric in origin, and two possible explanations for the presence of carbon in a hot DO white dwarf are discussed. The relationship of HD 149499B and other DO white dwarfs to the DB white dwarfs is also considered.

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