Triggers:CVs

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There is a very large variety of behaviours of CVs.

Types-of-CVs.png


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).

CV-VYScl.png


  • 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 and went down by 6 mag in 2006 and remained in it for nearly a year.