Fluxtube Dynamics in Neutron Star Cores
arXiv:1709.02303 · doi:10.1002/asna.201713441
Abstract
Although the detailed structure of neutron stars remains unknown, their equilibrium temperatures lie well below the Fermi temperature of dense nuclear matter, suggesting that the nucleons in the stars' core form Cooper pairs and exhibit macroscopic quantum behavior. The presence of such condensates impacts on the neutron stars' large scale properties. Specifically, superconducting protons in the outer core (expected to show type-II properties) alter the stars' magnetism as the magnetic field is no longer locked to the charged plasma but instead confined to fluxtubes. The motion of these structures governs the dynamics of the core magnetic field. To examine if field evolution could be driven on observable timescales, several mechanisms affecting the fluxtube distribution are addressed and characteristic timescales for realistic equations of state estimated. The results suggest that the corresponding timescales are not constant but vary for different densities inside the star, generally being shortest close to the crust-core interface.
arXiv commentProceedings of the 4th Caribbean Symposium on Cosmology, Gravitation, Nuclear and Astroparticle Physics (STARS2017) and 5th International Symposium on Strong Electromagnetic Fields and Neutron Stars (SMFNS2017)
References in corpus (16)
- Isospin Asymmetry in Nuclei and Neutron Stars
- Unifying the observational diversity of isolated neutron stars via magneto-thermal evolution models
- Grand Unification in Neutron Stars
- Constraining Hadronic Superfluidity with Neutron Star Precession
- Magnetic field dissipation in neutron star crusts: from magnetars to isolated neutron stars
- Magnetohydrodynamics of superfluid and superconducting neutron star cores
- Hall Effect in Neutron Star Crusts: Evolution, Endpoint and Dependence on Initial Conditions
- Magnetars: super(ficially) hot and super(fluid) cool
- Vortex buoyancy in superfluid and superconducting neutron stars
- Two-fluid models of superfluid neutron star cores
- The contrasting magnetic fields of superconducting pulsars and magnetars
- Magnetic Field Evolution in Superconducting Neutron Stars
- Simulated magnetic field expulsion in neutron star cores
- Flux tubes and the type-I/type-II transition in a superconductor coupled to a superfluid
- A Novel Mechanism for Type-I Superconductivity in Neutron Stars
- Magnetic field evolution of accreting neutron stars