Variable Stars - TT Ari
Type Nova like stars; VY Scl sub-type Click for lightcurve Nova-like stars are cataclysmic variables where the mass transfer rate is above a certain limit and their accretion disks are stable because they are nearly fully ionized to their outer (tidal cut off) boundary and this condition suppresses dwarf nova outbursts. Also known as UX (UX Ursae Majoris stars). VY Scl subtypes are cataclysmic binary systems with a hot (35,000-65,000 K) and luminous white dwarf that occasionally undergo fadings of more than 1 magnitude (up to several magnitudes) due to a low rate of mass transfer. These fadings might last from days to years. At maximum they vary up to 1 magnitude. They show no outbursts even though at minimum they fall into the dwarf novae instability strip. This could be caused by the possible magnetic nature of the white dwarf. Orbital periods usually range between 0.12 and 0.18 d. AAVSO Legacy Cataclysmic Variable Programme
Hills Observatory: 1 January 2013 to 10 July 2018