A warped accretion disc in PX And ?
arXiv:astro-ph/0210198
Abstract
We have undertaken a photometric study of the SW Sex star, PX And. We clearly identify a negative superhump signal which might be regarded as the signature of a nodal precessing disc, possibly warped. PX And is also observed to possess highly variable eclipse depth and we discuss two possible explanations.
To appear in the Proceedings of "Interplay between periodic, cyclic and stochastic variability in selected areas of the HR diagram", ASP Conf. Ser., 2003, C. Sterken, ed. - 6 pages