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Temperature effects on white dwarfs in modified gravity

Sofía Vidal1,*, Aneta Wojnar2,†, and Laur Järv1,‡

  • 1Laboratory of Theoretical Physics, Institute of Physics, University of Tartu, W. Ostwaldi 1, 50411 Tartu, Estonia
  • 2Institute of Theoretical Physics, University of Wrocław, plac Maxa Borna 9, 50-206 Wrocław, Poland

  • *Contact author: sofia.vidal@ut.ee
  • †Contact author: aneta.wojnar@uwr.edu.pl
  • ‡Contact author: laur.jarv@ut.ee
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Phys. Rev. D 114, 104001 – Published 2 November, 2026

DOI: https://doi.org/10.1103/fcmj-vbtt

Abstract

In this article we analyze the effects of a finite temperature equation of state on the equilibrium structure of white dwarfs in massive Brans-Dicke theory as well as the symmetron and dilaton screening mechanisms. We compute and present the numerically obtained mass-radius relation, effective gravitational constant as well as radial profiles of the scalar field, pressure and metric within the star. We show that assuming a nonzero temperature effectively results in a larger radius while leaving the total mass of the star essentially unchanged, and discuss the interplay between the effective gravitational constant, central density, and radius of the star.

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Information

Phys. Rev. D 114, 104001– Published 2 November, 2026
  • Received 14 August 2026
  • Accepted 9 October 2026
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