Astron. Astrophys. 348, 364-370 (1999)
We have found that the Jurcevic et al. (1994) relation is not valid
for SU UMa stars.
Deviations from the above relation are observed in most SU UMa
stars; the larger are seen in the post-period-minimum candidates EG
Cnc and WZ Sge.
This is consistent with removed inner disks in some SU UMa stars,
specially in "period-bouncer" candidates.
The inner disk depletion seems to be larger for systems with
extreme cycle lengths (Fig. 3).
We cannot discard non-Keplerian disks as an alternative scenario,
but we present arguments favoring the inner disk depletion
The long-term FWHM variability observed in WZ Sge suggests
that the fraction of mass removed from the inner disk is variable and
possibly a function of the supercycle phase.
A new mass ratio estimator is given by Eq. 8. It is valid for dwarf
novae above and below the period gap but not for post-period minimum
© European Southern Observatory (ESO) 1999
Online publication: July 26, 1999