Ultraviolet observations of the symbiotic star AS 296

Details Ultraviolet observations of the symbiotic star AS 296 Ultraviolet observations of the symbiotic star AS 296

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...395..295g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 395, no. 1, p. 295-300.

Astronomy and Astrophysics

Astronomy

4

Binary Stars, Stellar Mass Accretion, Symbiotic Stars, Ultraviolet Astronomy, White Dwarf Stars, Giant Stars, Iue, Late Stars, Ubv Spectra

Scientific paper

AS 296 is a well-known S-type symbiotic star which underwent an optical outburst during 1988. In this paper, UV data based on IUE observations obtained both during the quiescent and outburst stages are presented and discussed, correlating them to observations made in the optical region. It is concluded that the object is a symbiotic nova, in which the outburst is due to a thermonuclear runaway produced in the hydrogen-burning shell of a white dwarf with M of about 0.5 solar masses, accreting from the late-type giant at a rate M(acc) of about 9.7 x 10 exp -9 solar mass/year. It is not possible to determine from the observations if the hydrogen flash is degenerate or nondegenerate.

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