Neutrino-triggered asymmetric magnetorotational mechanism for pulsar natal kick

TL;DR

This paper reanalyzes neutrino-driven mechanisms for pulsar natal kicks, highlighting underestimated magnetic field requirements and proposing a new standard neutrino mechanism involving magnetic flux asymmetry in supernovae.

Contribution

It introduces a novel mechanism where magnetic flux asymmetry from standard neutrinos causes pulsar kicks, challenging previous sterile neutrino models.

Findings

Magnetic field strengths for observable kicks were underestimated.

A new mechanism involving magnetic flux asymmetry with standard neutrinos is proposed.

The magnetic pressure asymmetry can produce significant pulsar natal kicks.

Abstract

The sterile neutrino mechanisms for natal neutron star kicks are reanalyzed. It is shown that the magnetic field strengths needed for obtaining the observable values of kicks were underestimated essentially. Another mechanism with standard neutrinos is discussed where the outgoing neutrino flux in a supernova explosion with a strong toroidal magnetic field generation causes the field redistribution in "upper" and "lower" hemispheres of the supernova envelope. The resulting magnetic field pressure asymmetry causes the pulsar natal kick.