Voracious vortexes in cataclysmic variables. A multi-epoch tomographic study of HT Cassiopeia

  title={Voracious vortexes in cataclysmic variables. A multi-epoch tomographic study of HT Cassiopeia},
  author={V. V. Neustroev and S. V. Zharikov and N. V. Borisov},
  journal={arXiv: Solar and Stellar Astrophysics},
We present multi-epoch, time-resolved optical spectroscopic observations of the dwarf nova HT Cas, obtained during 1986, 1992, 1995 and 2005 with the aim to study the properties of emission structures in the system. We determined that the accretion disc radius, measured from the double-peaked emission line profiles, is persistently large and lies within the range of 0.45-0.52a, where a is the binary separation. This is close to the tidal truncation radius r_max=0.52a. This result contradicts… 
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