15–19 Jun 2015
Hotel Mercure Buda, Budapest
Europe/Budapest timezone
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Probing superfluid properties of magnetars with magneto-elastic oscillations

18 Jun 2015, 14:50
25m
Conference Room A (Hotel Mercure Buda)

Conference Room A

Hotel Mercure Buda

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≲150Hz and resonantly excited high-frequency QPOs (f>500Hz), 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