The variability of the UV spectrum of the symbiotic star BF Cygni

Details The variability of the UV spectrum of the symbiotic star BF Cygni The variability of the UV spectrum of the symbiotic star BF Cygni

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.281a.373g&link_type=abstract

In its A Decade of UV Astronomy with the IUE Satellite, Volume 1 p 373-376 (SEE N89-10682 01-89)

Astronomy and Astrophysics

Astronomy

2

Iue, Spaceborne Astronomy, Symbiotic Stars, Ultraviolet Astronomy, Ultraviolet Spectra, Line Spectra, Stellar Spectrophotometry, Variability

Scientific paper

The symbiotic star BF Cygni was monitored by IUE in low and high resolution since July 1986 to cover a full photometric period. In order to study the long-term UV variability of the system, spectra were used with archive data taken during the period 1979 to 1981. During the IUE lifetime, BF Cygni underwent dramatic changes in the UV continuum and emission line fluxes. Most of the emission lines vary in phase with the continuum with deep eclipses near photometric phase 0. All the observational evidence supports a model in which the variability of the system could be mainly due to occultations of the different emitting regions during the orbital motion.

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