Fast neutrino cooling of nuclear pasta in neutron stars: molecular dynamics simulations
Abstract
The direct URCA process of rapid neutrino emission can occur in nonuniform nuclear pasta phases that are expected in the inner crust of neutron stars. Here, the periodic potential for a nucleon in nuclear pasta allows momentum conservation to be satisfied for direct URCA reactions. We improve on earlier work by modeling a rich variety of pasta phases (gnocchi, waffle, lasagna, and anti-spaghetti) with large-scale molecular dynamics simulations. We find that the neutrino luminosity due to direct URCA reactions in nuclear pasta can be 3 to 4 orders of magnitude larger than that from the modified URCA process in the NS core. Thus neutrino radiation from pasta could dominate radiation from the core and this could significantly impact the cooling of neutron stars
Cite
@article{arxiv.2006.04963,
title = {Fast neutrino cooling of nuclear pasta in neutron stars: molecular dynamics simulations},
author = {Zidu Lin and Matthew E. Caplan and Charles J. Horowitz and Cecilia Lunardini},
journal= {arXiv preprint arXiv:2006.04963},
year = {2020}
}
Comments
12 pages, 9 figures, Accepted by PRC, Fig. 9b was given at wrong temperature in earlier version, and the mistake was corrected in this version