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1993•Monthly Notices of the Royal Astronomical SocietyOpen access

Disc-overflow accretion in the intermediate polar FO Aquarii

C. Hellier

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Abstract

The Ginga X-ray light curve of FO Aqr shows spin, orbital, and beat period modulations. Norton et al. have interpreted this as resulting from diskless accretion. I show that the light curve is also compatible with a hybrid model in which accreting material flows through a disk and also in a stream above the disc. This alternative is supported by several lines of evidence.

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The Ginga X-ray light curve of FO Aqr shows spin, orbital, and beat period modulations. Norton et al. have interpreted this as resulting from diskless accretion. I show that the light curve is also compatible with a hybrid model in which accreting material flows through a disk and also in a stream above the disc. This alternative is supported by several lines of evidence.

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Available abstract

The Ginga X-ray light curve of FO Aqr shows spin, orbital, and beat period modulations. Norton et al. have interpreted this as resulting from diskless accretion. I show that the light curve is also compatible with a hybrid model in which accreting material flows through a disk and also in a stream above the disc. This alternative is supported by several lines of evidence.

Key concepts: Physics, Intermediate polar, Light curve, Accretion disc, Astrophysics, Accretion (finance), Polar, Cataclysmic variable star

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