Post-burst pulsed X-ray and gamma-ray emission of magnetars (SGR & AXP) is most likely powered by non-radial torsion oscillations of neutron stars Sergey.

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Presentation transcript:

Post-burst pulsed X-ray and gamma-ray emission of magnetars (SGR & AXP) is most likely powered by non-radial torsion oscillations of neutron stars Sergey Bastrukov

Non-typically long period for young neutron star

F. Weber

Global Torsional Pulsations Magnetic field frozen in the neutron star serves as a chief promoter of radiative activity of pulsars magnetars

Alfven MHD pulsations of neutron star in dissipative free regime

The detected QPO’s (periodicity) in X-ray emission of neutron stars can be caused by non-radial Alfven MHD oscillations of neutron stars.

Torsional vibrations in the surface layers may explain oscillations in the tail of Type I X-ray bursts T. Strohmayer & A.Watts

Electromagnetic properties of neutron star matter

The point is to compute periods of Alfven oscillations in the crust

Oscillations of crust against core generating spiral magneto-electron waves (helicons or whistlers) Spiral oscillations of magnetic flux density and density of electron flow in spiral magneto-electron wave

X-ray and gamma-ray emission can be generated by cyclotron oscillations of electrons

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