SIMBAD references

We present and analyse UV low-resolution spectra of CH Cyg taken during the whole period of the International Ultraviolet Explorer (IUE) mission. Our analysis of the variation in the UV/optical hot star continuum confirmed the basic scenario of sporadic accretion in the symbiotic pair of the triple-star system as being responsible for maintaining its activity. During active phases, the hot continuum consists of two components. The first, far-UV emission, can be associated with a region where the material from the giant star in the symbiotic pair impacts the accreting matter around the hot star. The second, seen in the near-UV (λ≥2200Å) and the optical UBV region, can be produced by the accretion process onto the central star. Emission here shows characteristic temperatures of 6500 - 8700K. Both sources require an equivalent mass transfer rate of 1-2x10^–5M_☉/yr during the 1979-84 maximum, and about of 2x10^–6M_☉/yr in the 1992-95 active phase for derived parameters of the hot component in the triple-star system. Variation in the luminosities of both sources suggests that the basic physical principles of mass transfer in CH Cyg are similar to those of cataclysmic variables (CVs).