From Gaia Science Alerts Working Group
Revision as of 10:05, 6 October 2009 by Lukasz (talk | contribs) (VY Sculptoris)

Jump to: navigation, search

There is a very large variety of behaviours of CVs.

VY Sculptoris

A subclass of cataclysmic variables exhibiting occasional drops by several magnitudes at irregular intervals. The prototype of the class had shown a deep low-state in 2008, first since 1983 (Greiner et al. 2009).

  • amplitude: several magnitudes
  • drop time scale: 10-30 days
  • low state lasts for about 100 days
  • some periodicity (P about 10 days) is present
  • mechanism not well understood
  • some of VY Scl stars are supersoft X-ray sources during optical low-states.
  • V504 Cen has period of 4.21h