Upper critical field and (non)-superconductivity of magnetars
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In this article, the authors construct equilibrium models of compact stars using a realistic equation of state and obtain the density range occupied by the proton superconductor in strong B-fields.Abstract:
We construct equilibrium models of compact stars using a realistic equation of state and obtain the density range occupied by the proton superconductor in strong B-fields. We do so by combining the density profiles of our models with microscopic calculations of proton pairing gaps and the critical unpairing field H
c2 above which the proton type-II superconductivity is destroyed. We find that magnetars with interior homogeneous field within the range 0.1 ≤ B
16 ≤ 2, where B
16 = B/1016 G, are partially superconducting, whereas those with B
16 > 2 are void of superconductivity. We briefly discuss the neutrino emissivity and superfluid dynamics of magnetars in the light of their (non)-superconductivity.read more
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Axion star collisions with neutron stars and fast radio bursts
TL;DR: In this article, the authors argue that collisions of dilute axion stars with neutron stars, of the type known as "magnetars," may be the origin of most of the observed fast radio bursts.
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Equation of State of Strongly Magnetized Matter with Hyperons and Δ-Resonances
TL;DR: In this article, a new equation of state for the baryonic matter under an intense magnetic field was constructed within the framework of covariant density functional theory, where the composition of matter includes hyperons as well as Δ-resonances.
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Equation of state of strongly magnetized matter with hyperons and $\Delta$-resonances
TL;DR: In this article, a new equation of state for the baryonic matter under an intense magnetic field was constructed within the framework of covariant density functional theory, which includes hyperons as well as $ \Delta$-resonances.
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Rapid rotational crust-core relaxation in magnetars
TL;DR: In this article, it was shown that the rapid crust-core coupling is incompatible with oscillation models of magnetars that completely decouple the core superfluid from the crust and that magnetar precession is damped by the coupling of normal fluids to the superfluid core and, if observed, needs to be forced or continuously excited by seismic activity.
References
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Journal Article
Neutrino-pair emission in a strong magnetic field
TL;DR: In this paper, the neutrino emissivity of strongly magnetized neutron stars was investigated in strong magnetic fields, and it was shown that for magnetic fields in excess of 10 18 G and temperatures a few times 10 9 K, the one-body bremsstrahlung is the dominant process.
Journal ArticleDOI
Electrical conductivity of neutron star cores in the presence of strong magnetic fields: Effects of interactions and superfluidity of nucleons
E. Østgaard,D.G. Yakovlev +1 more
TL;DR: In this paper, the electric resistivity tensor of npe-matter in the cores of neutron stars with magnetic field B is calculated for the case when the protons are nonsuperfluid and the neutrons are either normal or superfluid due to the singlet-state pairing.
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