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Information × Registration Number 0204U003028, 0101U002223 , R & D reports Title Density waves in accretion disks and origin of activity cycles of young stars. popup.stage_title Head Grinin V.P., Registration Date 21-01-2004 Organization Scientific-research institute "Crimean astrophysical observatory" popup.description2 Some evidence found for significant deviations from axial symmetry in circumstellar disks of UX Ori type stars. These deviations are possibly induced bylow-mass companions. A new model proposed for the eclipses in young binary systems, where "obscuring body" is a disk wind from secondary component. Main difference of this model from that of classical eclipsing binary systems is that eclipses may occur even when the angle between orbital plane and line of sight is large, and duration of eclipses can be comparable with orbital period. This provides some basis for explanation of exotic eclipsing systems with long minima and cyclic activity of some UXORs. Product Description popup.authors popup.nrat_date 2020-04-02 Close