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Crust-core interactions and the magnetic dipole orientation in neutron stars

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arxiv astro-ph/9801070 v1 pith:S7FEPQF6 submitted 1998-01-09 astro-ph

Crust-core interactions and the magnetic dipole orientation in neutron stars

classification astro-ph
keywords dipolemagneticmodelstarneutroncrust-coreelectromagnetictorques
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We develop an effective model for a neutron star with a magnetosphere. It takes into account the electromagnetic torques acting on the magnetic dipole, the friction forces between the crust and the core, and the gravitational corrections. Anomalous electromagnetic torques, usually neglected in a rigid star model, play here a crucial role for the alignement of the magnetic dipole. The crust-core coupling time implied by the model is consistent with the observational data and other theoretical estimations. This model describes the main features of the behavior of the magnetic dipole during the life of the star, and in particular gives a natural explanation for the n<3 value of the breaking index in a young neutron star.

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