TT Ari: Recent Negative Superhumps and QPO's

Details TT Ari: Recent Negative Superhumps and QPO's TT Ari: Recent Negative Superhumps and QPO's

Feb 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006atel..718....1y&link_type=abstract

The Astronomer's Telegram, #718

Astronomy and Astrophysics

Astronomy

2

Optical, Request For Observations, Cataclysmic Variables

Scientific paper

TT Ari has been recently discovered to be at a relatively unstable phase by Andronov, Gazeas & Niarchos (2005, VSNET-Campaign 1630). Its prolonged "positive superhump" state from 1997 to 2004 has changed. In October-November, 2005, the star was fainter, and the superhumps are not pronounced. The dominating type of variability was quasi-periodic oscillations (QPO) with a time-scale of 10-35 minutes and amplitude 0.07 mag (B).

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