Anomalous hydrodynamics kicks neutron stars
Abstract
Observations show that, at the beginning of their existence, neutron stars are accelerated briskly to velocities of up to km/s. We discuss possible mechanisms contributing to these kicks in a systematic effective-field-theory framework. Anomalies of the underlying microscopic theory result in chiral transport terms in the hydrodynamic description, and we identify these as explanation for the drastic acceleration. In the presence of vorticity or a magnetic field, the chiral transport effects cause neutrino emission along the respective axes. In typical scenarios, the transport effect due to the magnetic field turns out to be strong enough to explain the kicks. Mixed gauge-gravitational anomalies enter in a distinct way, and we also discuss their implications.
Keywords
Cite
@article{arxiv.1410.3833,
title = {Anomalous hydrodynamics kicks neutron stars},
author = {Matthias Kaminski and Christoph F. Uhlemann and Marcus Bleicher and Jürgen Schaffner-Bielich},
journal= {arXiv preprint arXiv:1410.3833},
year = {2014}
}
Comments
5 pages, 2 figures