Query : 2006A&A...450.1097B

2006A&A...450.1097B - Astronomy and Astrophysics, volume 450, 1097-1106 (2006/5-2)

Evolution of the magnetic field in magnetars.


Abstract (from CDS):

We use numerical MHD to look at the stability of a possible poloidal field in neutron stars (Flowers & Ruderman, 1977ApJ...215..302F), and follow its unstable evolution, which leads to the complete decay of the field. We then model a neutron star after the formation of a solid crust of high conductivity. As the initial magnetic field we use the stable ``twisted torus'' field which was the result of our earlier work (Braithwaite & Nordlund, 2006A&A...450.1077B), since this field is likely to exist in the interior of the star at the time of crust formation. We follow the evolution of the field under the influence of diffusion, and find that large stresses build up in the crust, which will presumably lead to cracking. We put this forward as a model for outbursts in soft gamma repeaters.

Abstract Copyright:

Journal keyword(s): instabilities - magnetohydrodynamics (MHD) - stars: magnetic fields - stars: neutron

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 PSR B0525-66 Psr 05 26 00.7 -66 04 35           ~ 537 1
2 GBS 1900+14 gB 19 07 13 +09 19.6           ~ 839 0

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