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

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

2007-05-22

arxiv.org/abs/0705.3259v1

Astronomy and Astrophysics

Astrophysics

9 pages, 6 figures, 3 tables. Accepted by the Monthly Notices of the Royal Astronomical Society

Scientific paper

10.1111/j.1365-2966.2007.12003.x

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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