[vsnet-alert 13215] T Pyx: variations shorter than Porb!
tkato at kusastro.kyoto-u.ac.jp
Thu Apr 21 09:34:57 JST 2011
T Pyx: variations shorter than Porb!
We have received time-series photometry of T Pyx from Josch Hambsch
and Berto Monard. The object is still in slowly rising phase.
Most notably, Monard's observations seem to indicate the presence
of periodicity at 0.0737(1) d with mean amplitudes of 0.03 mag.
The signal appears to be coherent. This periodicity is 3.3 % shorter
than the orbital period (0.076223 d). If it were an accretion-disk
system, thie periodicity can be referred to as negative superhumps.
What is the cause of this unusual variation?
Further follow-up observations are strongly encouraged.
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