Chiral plasma instability and inverse cascade from nonequilibrium left-handed neutrinos in core-collapse supernovae

Abstract

We show that the backreaction of left-handed neutrinos out of equilibrium on the matter sector induces an electric current proportional to a magnetic field even without a chiral imbalance for electrons in core-collapse supernovae. We derive the transport coefficient of this effect based on the recently formulated chiral radiation transport theory for neutrinos. This chiral electric current generates a strong magnetic field via the so-called chiral plasma instability, which could provide a new mechanism for the strong and stable magnetic field of magnetars. We also numerically study the physical origin of the inverse cascade of the magnetic energy in the magnetohydrodynamics including this current. Our results indicate that incorporating the chiral effects of neutrinos would drastically modify the hydrodynamic evolutions of supernovae, which may also be relevant to the explosion dynamics.

8 pages, 6 figures; v2: added figure 2 on the time evolution of magnetic helicity, minor revisions, published version

References in corpus (7)

• The Chiral Magnetic Effect
• The Status of Multi-Dimensional Core-Collapse Supernova Models
• The explosion mechanism of core-collapse supernovae: progress in supernova theory and experiments
• The turbulent chiral-magnetic cascade in the early universe
• The Role of the Electron Mass in Damping Chiral Magnetic Instability in Supernova and Neutron Stars
• Helical magnetic effect and the chiral anomaly
• Magnetic field induced neutrino chiral transport near equilibrium

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• Effective Chiral Magnetic Effect from Neutrino Radiation
• Chiral kinetic theory with self-energy corrections and neutrino spin Hall effect
• Analytic solutions for the linearized first-order magnetohydrodynamics and implications for causality and stability
• A Drude-Lorentz dielectric in the presence of a magnetic current density
• Magnetar field dynamics shaped by chiral anomalies and helicity
• First-order spin magnetohydrodynamics
• Efficiency of dynamos from an autonomous generation of chiral asymmetry
• Inefficiency of chiral dynamos in protoneutron stars and the early universe