TY - GEN

T1 - Core-crust interaction of toroidal modes of magnetized neutron stars

AU - Lee, U.

PY - 2007/12/1

Y1 - 2007/12/1

N2 - We calculate axisymmetric toroidal modes of magnetized neutron stars with a solid crust. We assume the interior of the star is threaded by a poloidal magnetic field that is continuous at the surface with the outside dipole field whose strength Bp at the magnetic pole is Bp ∼ 10 16G. Since separation of variables is not possible for oscillations of magnetized stars, to represent the angular dependence of the oscillation modes we employ finite series expansions in terms of spherical harmonic functions. For Bp ∼ 1016G, we find isolated sequences of low radial order toroidal modes, whose oscillation frequency slowly increases as the number of radial nodes of the eigenfunction increases. The frequency spectrum of toroidal modes for Bp ∼ 1016G is largely different from that of crustal toroidal modes of the non-magnetized model.

AB - We calculate axisymmetric toroidal modes of magnetized neutron stars with a solid crust. We assume the interior of the star is threaded by a poloidal magnetic field that is continuous at the surface with the outside dipole field whose strength Bp at the magnetic pole is Bp ∼ 10 16G. Since separation of variables is not possible for oscillations of magnetized stars, to represent the angular dependence of the oscillation modes we employ finite series expansions in terms of spherical harmonic functions. For Bp ∼ 1016G, we find isolated sequences of low radial order toroidal modes, whose oscillation frequency slowly increases as the number of radial nodes of the eigenfunction increases. The frequency spectrum of toroidal modes for Bp ∼ 1016G is largely different from that of crustal toroidal modes of the non-magnetized model.

KW - Instabilities

KW - Stars: magnetic fields

KW - Stars: neutron

KW - Stars: oscillations

UR - http://www.scopus.com/inward/record.url?scp=71449087828&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=71449087828&partnerID=8YFLogxK

U2 - 10.1063/1.2818980

DO - 10.1063/1.2818980

M3 - Conference contribution

AN - SCOPUS:71449087828

SN - 9780735404625

T3 - AIP Conference Proceedings

SP - 263

EP - 270

BT - Unsolved Problems in Stellar Physics - A Conference in Honour of Douglas Gough

T2 - Conference on Unsolved Problems in Stellar Physics

Y2 - 2 July 2007 through 6 July 2007

ER -