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.
Bulk viscosity transport coefficients in neutron star mergers / Yang, Yumu; Hippert, Mauricio; Speranza, Enrico; Noronha, Jorge. - In: EPJ WEB OF CONFERENCES. - ISSN 2100-014X. - ELETTRONICO. - 296:(2024), pp. 1-4. ( 30th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions, Quark Matter 2023 Hilton of the Americas, usa 2023) [10.1051/epjconf/202429603003].
Bulk viscosity transport coefficients in neutron star mergers
Speranza, Enrico;
2024
Abstract
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.
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