https://doi.org/10.1051/epjconf/202429603003
Bulk viscosity transport coefficients in neutron star mergers
1 Illinois Center for Advanced Studies of the Universe & Department of Physics, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA
2 Theoretical Physics Department, CERN, 1211 Geneva 23, Switzerland
* e-mail: yumuy2@illinois.edu
** e-mail: hippert@illinois.edu
*** e-mail: enrico.speranza@cern.ch
**** e-mail: jn0508@illinois.edu
Published online: 26 June 2024
We compute first and second-order bulk-viscous transport properties due to weak-interaction processes in npe matter in the neutrino transparent regime. The transport coefficients characterize the out-of-beta-equilibrium pressure corrections, which depend on the weak-interaction rates and the equation of state. We calculate these coefficients for realistic equations of state and show they are sensitive to changes in the nuclear symmetry energy J and its slope L.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
