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

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

1998-01-09

arxiv.org/abs/astro-ph/9801070v1

Astrophys.J. 503 (1998) 374

Astronomy and Astrophysics

Astrophysics

23 pages, 1 figure

Scientific paper

10.1086/305991

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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