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; R. Rea; Denis J. Sullivan; F. Velhuis

doi:10.1111/j.1365-2966.2007.12003.x

arXiv · 0705.3259

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·R. Rea·Denis J. Sullivan·F. Velhuis

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Abstract

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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N. Mhlahlo, D. A. H. Buckley, V. S. Dhillon, S. B. Potter, B. Warner, P. Woudt, G. Bolt, J. McCormick, R. Rea, Denis J. Sullivan, F. Velhuis. 2007-05-22. The Discovery of a Persistent Quasi-Periodic Oscillation in the Intermediate Polar TX Col. https://doi.org/10.1111/j.1365-2966.2007.12003.x

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