Entropy and thermodynamical stability of white dwarfs
Ji\v{r}\'i Adam, Jr., Emil Truhl\'ik
TL;DR
This paper investigates the structure and thermodynamical stability of white dwarfs at non-zero temperatures using Helmholtz free energy, providing insights into their stability criteria within plasma physics.
Contribution
It introduces a framework for analyzing white dwarf stability at finite temperatures based on Helmholtz free energy, extending previous zero-temperature models.
Findings
White dwarf structure at non-zero temperature modeled.
Thermodynamical stability described via Helmholtz free energy.
Stability criteria derived for Coulomb plasma in white dwarfs.
Abstract
A structure of spherical white dwarfs is calculated for a non-zero temperature. It is shown that the thermodynamical stability of the white dwarf stars can be described naturally within the concept of the Helmholtz free energy of the Coulomb fully ionized electron-ion plasma.
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astro and Planetary Science · High-pressure geophysics and materials