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Disc Accretion Onto Magnetic Stars: Slow Rotator And Propeller

Published online by Cambridge University Press:  12 April 2016

Jianke Li  and
Dayal T. Wickramasinghe
Jianke Li
Affiliation:
ANUATC, and Department of Mathematics, The Australian National University, ACT 0200, Australia
Dayal T. Wickramasinghe
Affiliation:
ANUATC, and Department of Mathematics, The Australian National University, ACT 0200, Australia

Abstract

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We study two magnetised accretion – outflow problems: the slow rotator and the propeller. In the former case, we show that the funnel flow does not result in the accretion of a significant amount of matter angular momentum, contrary to what is assumed in the standard Ghosh and Lamb model. Implications of this finding are investigated, particularly in relation to the fastness parameter. We also argue that magnetospheric mass ejection (the magnetospheric streamer model) is a viable mechanism for the ejection of mass and angular momentum from a magnetic star-disc system in the propeller regime.

Type
Part 6. Disk-Star-Magnetosphere Interaction
Information
International Astronomical Union Colloquium , Volume 163: Accretion Phenomena and Related Outflows , 1997 , pp. 241 - 250
Copyright
Copyright © Astronomical Society of the Pacific 1997

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