European Physical Journal C: Particles and Fields (Mar 2024)

The origin of the cosmological constant in unimodular gravity

  • Enrique Álvarez,
  • Jesús Anero,
  • Irene Sánchez-Ruiz

DOI
https://doi.org/10.1140/epjc/s10052-024-12651-7
Journal volume & issue
Vol. 84, no. 3
pp. 1 – 8

Abstract

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Abstract It is well-known that in unimodular gravity (UG) the cosmological constant is not sourced by a constant energy density, but rather appears as some sort of integration constant. In this work we try to flesh this out by studying in some detail a couple of examples, one from cosmology and the other from gravitational collapse.