The Discovery of a Persistent Quasi-Periodic Oscillation in the Intermediate Polar TX Col

B. Warner; D.A.H. Buckley; Denis J. Sullivan; F. Velhuis; G. Bolt; J. McCormick; N. Mhlahlo; P. Woudt; R. Rea; S.B. Potter

arxiv: 0705.3259 · v1 · submitted 2007-05-22 · 🌌 astro-ph

The Discovery of a Persistent Quasi-Periodic Oscillation in the Intermediate Polar TX Col

N. Mhlahlo , D.A.H. Buckley , V.S. Dhillon , S.B. Potter , B. Warner , P. Woudt , G. Bolt , J. McCormick

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R. Rea Denis J. Sullivan F. Velhuis

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classification 🌌 astro-ph

keywords quasi-periodicaccretionblobsdiscfrequencyvariationbeatingboundary

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We report on the detection of an ~5900 s quasi-periodic variation in the extensive photometry of TX Col spanning 12 years. We discuss five different models to explain this period. We favour a mechanism where the quasi-periodic variation results from the beating of the Keplerian frequency of the `blobs' orbiting in the outer accretion disc with the spin frequency, and from modulated accretion of these `blobs' taking place in a shocked region near the disc/magnetosphere boundary.

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The Discovery of a Persistent Quasi-Periodic Oscillation in the Intermediate Polar TX Col

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