Double your pleasure: a double-double eclipsing binary?

American Association of Variable Star Observers (AAVSO)
Fri, 06/22/2012 - 00:03

I just ran across this pre-print article on a star system that apparently consists of a pair of eclipsing binaries. The two close binaries have a period ratio close to 3:2 so although the light curve is pretty bizarre it's repeating.  The system, CzeV343 = GSC 02405-01886, is in Auriga and is reasonably bright  at V=13.5.  It's not clear yet whether this is really a quadruple system - it's possible that two unrelated binary systems just happen to lie in the same direction.  Long-term monitoring of the eclipses should eventually show light-time effects as the two binaries revolve around each other if the truly are related.

Shawn (DKS)

Magyar Csillagaszati Egyesulet, Valtozocsillag Szakcsoport (Hungary) (MCSE)

Dear Shawn,

Thank you for calling our attention to this interesting system! As I can see this system is not in the VSX database yet. In the article I haven't seen any coordinates or identification for this star, but this site

gives the following position for CzeV3435 48 24    +30 57 3.6,    +/- 1 arcmin (J2000).

Robert Fidrich (FRF)