The ultraviolet spectrum of the twin-degenerate interacting binary G61-29

Details The ultraviolet spectrum of the twin-degenerate interacting binary G61-29 The ultraviolet spectrum of the twin-degenerate interacting binary G61-29

Aug 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pasp...93..477l&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 93, Aug.-Sept. 1981, p. 477-480.

Astronomy and Astrophysics

Astronomy

18

Abundance, B Stars, Binary Stars, Stellar Spectra, Ultraviolet Spectra, White Dwarf Stars, Chemical Composition, Emission Spectra, Iue, Line Spectra, Novae, Resonance Lines, Stellar Mass Ejection

Scientific paper

A low-resolution IUE spectrum (1200 A-1900 A) of the twin-degenerate white-dwarf binary star G61-29 is presented. A comparison is made to similar IUE spectra of the old novae DQ Her and V603 Aql. G61-29 shows N V 1240 A and He II 1640 A in emission. Unlike the old novae, the C IV 1550 A doublet is not present. It is proposed that the mass-losing He white dwarf (with a mass of 0.02 solar mass) is the H-exhausted, He-rich core of an old star in which the original CNO nuclei have been converted to N-14 by the CNO-cycles.

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