Magnetically moderated outbursts of WZ Sagittae

  title={Magnetically moderated outbursts of WZ Sagittae},
  author={O. Matthews and R. Speith and G. Wynn and R. Institut and Univ. Tuebingen and U. Leicester},
  journal={Monthly Notices of the Royal Astronomical Society},
We argue that the quiescent value of the viscosity parameter of the accretion disc in WZ Sge may be αcold∼ 0.01, in agreement with estimates of αcold for other dwarf novae. Assuming the white dwarf in WZ Sge to be magnetic, we show that, in quiescence, material close to the white dwarf can be propelled to larger radii, depleting the inner accretion disc. The propeller therefore has the effect of stabilizing the inner disc and allowing the outer disc to accumulate mass. The outbursts of WZ Sge… Expand
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