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Published July 1, 1990 | Published
Journal Article Open

Spin-up of a rapidly rotating star by angular momentum loss

Abstract

Can a rotating star spin up by radiating away its angular momentum? And if so, what can we infer about the properties of such a star? We show that the spin of a rapidly rotating star like a pulsar can indeed increase as it radiates away energy and angular momentum. For this to happen the adiabatic index governing the equation of state must be very close to 4/3 if the star is rotating uniformly. Otherwise the star must be rotating differentially.

Additional Information

© 1990. The American Astronomical Society. Received 1990 March 16; accepted 1990 April 11. It is a pleasure to thank R. H. Durisen and L. S. Finn for several helpful discussions. This work has been supported in part by National Science Foundation grants AST 87-14475, PHY 86-03284 and INT 88-15793 at Cornell University. This cooperative research project has been supported jointly by the NSF and JSPS under the US-Japan Cooperative Science Program. Fellowship support from the John Simon Guggenheim Memorial Foundation is gratefully acknowledged by S. L. S.

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Published - 1990ApJ___357L__17S.pdf

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August 19, 2023
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