Magneto-elastic torsional oscillations of magnetars

Details Magneto-elastic torsional oscillations of magnetars Magneto-elastic torsional oscillations of magnetars

2010-11-24

arxiv.org/abs/1011.5406v1

J.Phys.Conf.Ser.283:012013,2011

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

6 pages, 1 figure, 1 table, Proceedings of NEB14, to appear in J. Phys.: Conf. Ser

Scientific paper

10.1088/1742-6596/283/1/012013

We extend a general-relativistic ideal magneto-hydrodynamical code to include the effects of elasticity. Using this numerical tool we analyse the magneto-elastic oscillations of highly magnetised neutron stars (magnetars). In simulations without magnetic field we are able to recover the purely crustal shear oscillations within an accuracy of about a few per cent. For dipole magnetic fields between 5 x 10^13 and 10^15 G the Alfv\'en oscillations become modified substantially by the presence of the crust. Those quasi-periodic oscillations (QPOs) split into three families: Lower QPOs near the equator, Edge QPOs related to the last open field line and Upper QPOs at larger distance from the equator. Edge QPOs are called so because they are related to an edge in the corresponding Alfv\'en continuum. The Upper QPOs are of the same kind, while the Lower QPOs are turning-point QPOs, related to a turning point in the continuous spectrum.

Affiliated with

Also associated with

No associations

Rating

Magneto-elastic torsional oscillations of magnetars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Magneto-elastic torsional oscillations of magnetars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magneto-elastic torsional oscillations of magnetars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-241322