Imprints of superfluidity on magneto-elastic QPOs of SGRs
arXiv:1304.3566 · doi:10.1103/PhysRevLett.111.211102
Abstract
Our numerical simulations show that axisymmetric, torsional, magneto-elastic oscillations of magnetars with a superfluid core can explain the whole range of observed quasi-periodic oscillations (QPOs) in the giant flares of soft gamma-ray repeaters. There exist constant phase, magneto-elastic QPOs at both low (f<150 Hz) and high frequencies (f>500 Hz), in full 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 strongly suggest that neutrons in magnetar cores are superfluid.
arXiv comment5 pages, 4 figures
References in corpus (38)
- The equation of state for nucleon matter and neutron star structure
- A unified equation of state of dense matter and neutron star structure
- Rapid Cooling of the Neutron Star in Cassiopeia A Triggered by Neutron Superfluidity in Dense Matter
- Cooling neutron star in the Cassiopeia~A supernova remnant: Evidence for superfluidity in the core
- Constraints on neutron star radii based on chiral effective field theory interactions
- Discovery of Rapid X-ray Oscillations in the Tail of the SGR 1806-20 Hyperflare
- Discovery of Fast X-ray Oscillations During the 1998 Giant Flare from SGR 1900+14
- Global Seismic Oscillations in Soft Gamma Repeaters
- Neutron conduction in the inner crust of a neutron star in the framework of the band theory of solids
- Neutron Star Asteroseismology. Axial Crust Oscillations in the Cowling Approximation
- The 2004 Hyperflare from SGR 1806-20: Further Evidence for Global Torsional Vibrations
- Magnetohydrodynamics of superfluid and superconducting neutron star cores
- Torsional Oscillations of Relativistic Stars with Dipole Magnetic Fields
- Magneto-elastic oscillations of neutron stars with dipolar magnetic fields
- On the theory of magnetar QPOs
- Shear Waves and Giant Flare Oscillations from Soft Gamma-Ray Repeaters
- Alfvén QPOs in Magnetars
- Neutron star oscillations and QPOs during magnetar flares
- Magnetars oscillations in the presence of a crust
- Effect of superfluidity on neutron star crustal oscillations
- Oscillations of General Relativistic Superfluid Neutron Stars
- A new general relativistic magnetohydrodynamics code for dynamical spacetimes
- Magneto-elastic oscillations and the damping of crustal shear modes in magnetars
- Alfven QPOs in magnetars in the anelastic approximation
- Towards real neutron star seismology: Accounting for elasticity and superfluidity
- Magnetar Oscillations I: strongly coupled dynamics of the crust and the core
- On the Quasi-Periodic Oscillations of Magnetars
- Superfluid signatures in magnetar seismology
- Magneto-elastic oscillations of neutron stars: exploring different magnetic field configurations
- Two-fluid models of superfluid neutron star cores
- The entrainment matrix of a superfluid neutron-proton mixture at a finite temperature
- Magnetohydrodynamics in Superconducting-Superfluid Neutron Stars
- Adiabatic oscillations of non-rotating superfluid neutron stars
- Stratification, superfluidity and magnetar QPOs
- Magnetar Oscillations II: spectral method
- Hydromagnetic waves in a superfluid neutron star with strong vortex pinning
- Axial quasi-normal modes of neutron stars: Accounting for the superfluid in the crust
- Lagrangian perturbation theory of nonrelativistic rotating superfluid stars
Cited by in corpus (33)
- Magnetars
- Magnetars: the physics behind observations
- Measuring the neutron star equation of state using X-ray timing
- Seismology of adolescent neutron stars: Accounting for thermal effects and crust elasticity
- Superfluidity and Superconductivity in Neutron Stars
- Nuclear Equation of state for Compact Stars and Supernovae
- Constraints on the nuclear equation of state and the neutron star structure from crustal torsional oscillations
- Constraints on the symmetry energy from observational probes of the neutron star crust
- Avoided crossing in gravitational wave spectra from protoneutron star
- Constraining properties of high-density matter in neutron stars with magneto-elastic oscillations
- Modulating the magnetosphere of magnetars by internal magneto-elastic oscillations
- Coherent magneto-elastic oscillations in superfluid magnetars
- Torsional Oscillations of a Magnetar with a Tangled Magnetic Field
- Crust-core transition of a neutron star: effects of the symmetry energy and temperature under strong magnetic fields
- Neutron star mass-radius constraints using the high-frequency QPOs of GRB 200415A
- Deformed crystals and torsional oscillations of neutron star crust
- Quasi-periodic oscillations in superfluid, relativistic magnetars with nuclear pasta phases
- Numerical models for stationary superfluid neutron stars in general relativity with realistic equations of state
- Search for quasi-periodic signals in magnetar giant flares
- Empirical formula of crustal torsional oscillations
- Strongly magnetized pulsars: explosive events and evolution
- Rapid rotational crust-core relaxation in magnetars
- Non-axisymmetric magnetic modes of neutron stars with purely poloidal magnetic fields
- Role of nuclear physics in oscillations of magnetars
- Quasi-periodic oscillations during magnetar giant flares in the strangeon star model
- Tangled magnetic field model of QPOs
- Selfsimilarity relations for torsional oscillations of neutron stars
- Zeeman splitting of torsional oscillation frequencies of magnetars
- Powerful flares and magneto-elastic oscillations of magnetars
- Magneto-elastic oscillations modulating the emission of magnetars
- Torsional oscillations of magnetized neutron stars: Impacts of Landau-Rabi quantization of electron motion
- Nonlinear coupling between magnetar QPOs
- Zeeman effect in oscillations of magnetars with toroidal magnetic fields