Kicks of magnetized strange quark stars induced by anisotropic emission of neutrinos

Abstract

We study the anisotropic neutrino emission from the core of neutron stars induced by the star's magnetic field. We model the core as made out of a magnetized ideal gas of strange quark matter and implement the conditions for stellar equilibrium in this environment. The calculation is performed without resorting to analytical simplifications and for temperature, density and magnetic field values corresponding to typical conditions for a neutron star's evolution. The anisotropic neutrino emission produces a rocket effect that contributes to the star's kick velocity. We find that the computed values for the kick velocity lie within the range of the observed values, reaching velocities of the order of $\sim 1000$ km s${}^{-1}$ for magnetic fields between $10^{15}-10^{18}$ G and radii of 20 to 5 km, respectively.

11 pages, 12 figures, published version

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• Thermal corrections to the gluon magnetic Debye mass
• Estimate for the neutrino magnetic moment from pulsar kick velocities induced at the birth of strange quark matter neutron stars
• Neutrino energy and momentum emission from magnetized dense quark matter
• Neutrino opacities in magnetic fields for binary neutron star merger simulations