Superfluid magneto-elastic oscillations in Magnetars

Mar 26, 2014, 5:40 PM
20m

Speaker

Dr Michael Gabler (MPA Garching)

Description

Our numerical simulations show that axisymmetric, torsional, magnetoelastic oscillations of magnetars with a superfluid core can explain the whole range of observed quasiperiodic oscillations (QPOs) in the giant flares of soft gamma-ray repeaters. There exist constant phase QPOs at $f\lesssim150$\,Hz and resonantly excited high-frequency QPOs ($f>500$\,Hz), in good agreement with observations. The range of magnetic field strengths required to match the observed QPO frequencies agrees with that from spin-down estimates. These results suggest that there is at least one superfluid species in magnetar cores.

Primary author

Dr Michael Gabler (MPA Garching)

Presentation materials