Speaker
Arnau Rios
(Universitat de Barcelona)
Description
In this talk, I will discuss the thermal index of low-density, high-temperature matter, motivated by gravitational wave observations of neutron-star binaries. We use the virial approximation to include nuclear interaction effects. In pure neutron matter, we find a relatively temperature-independent thermal index close to $\Gamma_\text{th} \approx 5/3$, with a negligible contribution from nuclear interactions. Including isospin asymmetry, as well as electrons and photons, the results change substantially. For $\beta-$equilibrated matter, we find a smooth transition between $\Gamma_\text{th} \approx 4/3$ at low densities and $\Gamma_\text{th} \approx 5/3$ at high densities.
Author
Arnau Rios
(Universitat de Barcelona)