[vsnet-outburst 7840] GW Lib: beat phenomenon emerged

[Taichi Kato]

   Berto Monard and Roland Santallo have reported further
time-series observations.  The data now clearly show
semi-periodic modulations of (late)superhump amplitudes.
The modulations are very well expressed by the beat phenomenon
between the period of late superhumps and the orbital period.
This phenomenon suggests that orbital humps started to show
significant phase-dependent contribution since June 13
(or somewhat earlier).  This interpretation would support
a different physical origin of WZ Sge-type late superhumps
from (either regular or enhanced) hot spot.

   See also Osaki and Meyer (2003) A&A 401, 325 Sec 2.3
for a discussion against the "enhanced hot spot" interpretation
of the 2001 superoutburst of WZ Sge.