The evolution of Cataclysmic Variables: Clues from HST & FUSE observations

Sofia Araujo-Betancor

Over the past few years it has become increasingly clear that our understanding of the evolution of cataclysmic variables (CVs) is a rather unsettled matter. A number of predictions made by the standard theory of CV evolution, disrupted magnetic braking, are in direct conflict with observations. Recent studies have proposed alternatives/modifications to the standard scenario of CV evolution that do fix some of the problems, but they also result in some new conflicts with the observations. It is obvious that without the properties of a statistically complete sample of CVs no current theory of CV evolution could be properly tested. Here I will report recent HST and FUSE observations of a group of magnetic CVs and Pre-CVs, from which temperatures of their white dwarf primaries have been derived. I will discuss the implications of the results for our current understanding of CV evolution.