TT Arietis : 1985 – 1999 accretion disc behaviour

Results of a long-term (1985–1999) photometric study of the VY Scl novalike TT Ari and CCD spectroscopic observations of the star in the region of Hα are presented. Pho-toelectric UBV observations carried out at Rozhen and Belo-gradchik observatories confirmed ∼ 6 years cyclical variability of the accretion disc luminosity in high state found by frequency… CONTINUE READING