(cba:news) V893 Sco
jop at astro.columbia.edu
Mon Jul 15 08:30:27 EDT 2013
Koji Mukai has reminded me of our pathetic knowledge of a very important
dwarf nova, V893 Sco. It's bright, nearby, quite X-ray-luminous, and
has a very short Porb. Plus it has outbursts, doubled emission lines,
and probable eclipses. It oughta be royalty among the SU UMas. But
actually, despite these shiny credentials, it has never really even
acquired citizenship in that realm.
Why not? Because neither superoutbursts nor superhumps have ever been
reported. Probably those of us interested in such things, e.g. me, have
shied away from studying this star. But now that the SU UMa phenomenon
has become decidedly the norm, we ought to be interested in the
well-documented exceptions, if indeed they are well-documented.
V893 Sco is still moderately in season for southerners. I think it
would be a great target for long-term CBA coverage, starting now.
p.s. Koji also sent me this advertisement for my favorite TV program of
my youth. Growing up in Yokohama, it taught me that you can outwit even
superpower-equipped villains, if you have a pure heart, a Honda 50, and
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