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Recoil velocity of pulsar/magnetar induced by magnetic dipole and quadrupole radiation

Published online by Cambridge University Press:  20 March 2013

Yasufumi Kojima
Yasufumi Kojima*
Affiliation:
Department of Physics, Hiroshima University, Higashi-Hiroshima, 739-8526, Japan email: kojima@theo.phys.sci.hiroshima-u.ac.jp
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Abstract

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Recoil velocity is examined as a back reaction to the magnetic dipole and quadrupole radiations from a pulsar/magnetar born with rapid rotation. The model is extended from notable Harrison-Tademaru one by including arbitrary field-strength of the magnetic quadrupole moment. The process is slow one operating on a spindown timescale. Resultant velocity depends on not the magnitude, but rather the ratio of the two moments and their geometrical configuration. The model does not necessarily lead to high spatial velocity for a magnetar with a strong magnetic field. This fact is consistent with the recent observational upper bound. The maximum velocity predicted with this model is slightly smaller than that of observed fast-moving pulsars.

Keywords

magnetic fieldsstars: neutronpulsars
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S291: Neutron Stars and Pulsars: Challenges and Opportunities after 80 years , August 2012 , pp. 428 - 430
Copyright
Copyright © International Astronomical Union 2013

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