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Precessing accretion discs in binary systems

Published online by Cambridge University Press:  12 April 2016

Alon Retter ,
Alexander Liu  and
Marc Bos
Alon Retter
Affiliation:
School of Physics, University of Sydney, NSW 2006, Australia
Alexander Liu
Affiliation:
Norcape Observatory, PO Box 300, Exmouth, 6707, Australia
Marc Bos
Affiliation:
Mt Molehill Observatory, 83a Hutton Street, Otahuhu, Auckland, New Zealand

Abstract

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Superhumps – quasi-periodic oscillations at periods a few percent different than the orbital periods – have been observed in several dozen binary systems of various types. It is well-accepted now that they are caused by the precession of the accretion disc. New findings on TV Col, TX Col and V4742 Sgr are presented. These cataclysmic variables (CVs) have exceptional precessing periods that cast strong doubt on the predictions of the Tidal Disc Instability model.

Type
Part 6. Binary stars and pulsation
Information
International Astronomical Union Colloquium , Volume 193: Variable Stars in the Local Group , 2004 , pp. 391 - 394
Copyright
Copyright © Astronomical Society of the Pacific 2004

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