Astron. Astrophys. 352, 239-247 (1999)
The light curve of RZ Leo during a time interval of 11-years is
characterized by highly variable humps.
A non-coherent photometric period of
is consistent with the data.
The hump amplitude is anti-correlated with the stellar mean
A new phenomenon was reported: the presence of "anti-humps" when
the system is faint.
Anti-humps might result from a regime of very low mass transfer
rate and normal alpha disks.
Non-coherent humps are compatible with a non-steady hot spot.
The rapid response of the accretion disk to the enhanced mass
transfer rate evidenced by the phenomena of early 1998 (Fig. 9)
suggests a disk with a normal viscosity parameter
The possibility of an undermassive secondary is rejected by
arguments concerning the observed optical and infrared flux
© European Southern Observatory (ESO) 1999
Online publication: November 23, 1999