(cba:news) V380 oph

Joe Patterson jop at astro.columbia.edu
Wed Aug 19 12:41:35 EDT 2015

Oops, I forgot about V380 Oph in yesterday's message.  V380 Oph has been 
in a low state for months (all year?), and these low states of VY Scl 
stars can teach us a lot about the secondary stars and processes. 
Gordon has got in some nights from Australia -= enough to demonstrate 
that the orbital signal dominates the light curve.  But it makes a big 
difference whether we see just one hump per orbit, or two.  One => 
probably a reflection effect, indicating a very hot WD.  Two => possibly 
the secondary star alone, with an "ellipsoidal" variation.
If you can do 19th mag (sorry), let's gang up on the star and torture it 
for its secrets.

Center for Backyard Astrophysics (CBA) mailing lists

More information about the cba-public mailing list