Doppler Tomography of Dwarf Nova IY UMa during Quiescence
Daniel J. Rolfe, Timothy M. C. Abbott, Carole A. Haswell
Abstract
Quiescent Doppler tomography of the newly discovered deeply-eclipsing SU UMa system IY UMa reveals properties of the region where the accretion stream from the donor impacts the edge of the disc. A very strong bright spot is produced and the Keplerian disc emission in the impact region is disrupted or obscured. The differing properties of Halpha, Hbeta and He I emission will allow physical parameters of the converging flow region to be studied.
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