6533b822fe1ef96bd127d88d

RESEARCH PRODUCT

Imprints of superfluidity on magneto-elastic QPOs of SGRs

Michael GablerPablo Cerdá-duránNikolaos StergioulasJosé A. FontEwald Müller

subject

High Energy Astrophysical Phenomena (astro-ph.HE)Astrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesGeneral Relativity and Quantum Cosmology (gr-qc)Astrophysics - High Energy Astrophysical PhenomenaGeneral Relativity and Quantum Cosmology

description

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.

yearjournalcountryeditionlanguage
2013-04-12
https://dx.doi.org/10.48550/arxiv.1304.3566