title: Imprints of superfluidity on magnetoelastic quasiperiodic oscillations of soft gamma-ray repeaters.
abstract: 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 is < or approximately equal to 150 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.
authors: Departamento de Astronomía y Astrofísica, Universitat de València, 46100 Burjassot, Valencia, Spain and Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Strasse 1, 85741 Garching, Germany.
authors: Michael
authors: M
authors: Gabler
authors: Pablo
authors: P
authors: Cerdá-Durán
authors: Nikolaos
authors: N
authors: Stergioulas
authors: José A
authors: JA
authors: Font
authors: Ewald
authors: E
authors: Müller