Speaker
Description
In this study we examine the effects of the bulk viscosity of dense matter containing neutrons, protons, and electrons in the environment of neutron stars. Our approach considers the bulk viscosity to be driven by the direct Urca mechanism which tries to restore the chemical equilibrium in a neutron star core for small perturbations of the baryon density. The bulk-viscous dissipation leads to heating and on a macroscopic scale the bulk viscosity is imprinted in the dissipative tidal deformability. The latter encodes information about the dynamical processes of neutron star interiors and their effect on the macroscopic features of neutron stars, especially in the late phase of an inspiraling binary neutron star system. The ability to measure parameters encoded in the tidal dissipative deformability by the advanced LIGO gravitational wave detectors can offer a new extra tool for examining the behavior of dense nuclear matter and imposing qualitative constraints on it. In our preliminary results we show the qualitative behavior of the dissipative tidal deformability for a phenomenological nuclear model.