From Gaia Science Alerts Working Group
Revision as of 14:34, 24 August 2009 by Lukasz (talk | contribs) (→‎DY Persei)
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R Corona Borealis stars

Example of RCrB star in the LMC as seen by OGLE-II

Only around 50 known in the Galaxy and Magellanic Clouds.


  • sudden and non-periodic drops in magnitude
  • drops by up to 8 magnitudes
  • some small variation in the baseline
  • the "dark" stage can last from days to years
  • recovers slowly to the baseline

DY Persei

Example OGLE light curve of DY Per-type candidate

Some people claim it is a similar type to RCrB, however the drops in magnitude are much smaller and seem to be periodical (P~1000d).