Sep 27 – 30, 2021
Yerevan, Armenia
Etc/GMT+4 timezone

Thermodynamics of one-component plasma for astrophysical applications

Sep 27, 2021, 3:35 PM
35m
Yerevan, Armenia

Yerevan, Armenia

Department of Physics, Alex Manukyan str. 1, Yerevan, Armenia

Speaker

Andrey Chugunov (Ioffe Institute)

Description

We apply path-integral Monte Carlo simulations to calculate the energy of crystallized one-component plasma: the system of atomic nuclei and a uniform incompressible background (electrons). We consider full range of conditions, which are typical for core of white dwarfs and envelope of neutron stars. The results are approximated by analytic formulae, which allow us to obtain various thermodynamic functions. In particular, we demonstrate that the total crystal specific heat can exceed the well-known harmonic contribution by a factor of 1.5 due to anharmonic effects. Combining our results with the thermodynamics of the quantum Coulomb liquid, we determine the density dependence of the melting temperature and the latent heat. The results are necessary for realistic modelling of the thermal evolution of white dwarfs and neutron stars.

Primary authors

Andrey Chugunov (Ioffe Institute) Dr Denis Baiko (Ioffe Institute)

Presentation materials

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