(cba:news) V380 oph
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.
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