Effects of Magnetic Fields in Hot White Dwarfs

TL;DR

This paper investigates how temperature and magnetic fields influence the microscopic and macroscopic properties of hot white dwarfs, revealing their significant impact on thermodynamics, magnetic field profiles, and stellar structure.

Contribution

It introduces a comprehensive model accounting for temperature, magnetic fields, and relativistic effects in white dwarf interiors, and explores their influence on stellar structure and magnetic profiles.

Findings

Temperature and magnetic fields significantly affect thermodynamical quantities.

Temperature influences magnetic field profiles, masses, and radii of white dwarfs.

Relativistic modeling provides insights into stellar structure under magnetic and thermal effects.

Abstract

In this work, we study the effects of temperature on magnetic white dwarfs. We model their interior as a nuclei lattice surrounded by a relativistic free Fermi gas of electrons, accounting for effects from temperature, Landau levels and anomalous magnetic moment. We find that, at low densities (corresponding to the outer regions of star), both temperature and magnetic field effects play an important role in the calculation of microscopic thermodynamical quantities. To study macroscopic stellar structures within a general-relativistic approach, we solve numerically the coupled Einstein's-Maxwell's equations for fixed entropy per particle configurations and discuss how temperature affects stellar magnetic field profiles, masses and radii.