English

Geodesic Structure of the Accelerated Stephani Universe

General Relativity and Quantum Cosmology 2021-06-14 v2

Abstract

For the spherically symmetric Stephani cosmological model with an accelerated expansion, we investigate the main scenarios of the test particle and photon motion. We show that a comoving observer sees an appropriate picture. In the case of purely radial motion, the radial velocity decreases slightly with time due to the universe expansion. Both particles and photons spiral out of the center when the radial coordinate is constant. In the case of the motion with arbitrary initial velocity, the observable radial distance to the test particle can increase under negative observable radial velocity.

Keywords

Cite

@article{arxiv.2103.08999,
  title  = {Geodesic Structure of the Accelerated Stephani Universe},
  author = {Irina Bormotova and Elena Kopteva and Zdenek Stuchlik},
  journal= {arXiv preprint arXiv:2103.08999},
  year   = {2021}
}

Comments

15 pages, 11 figures

R2 v1 2026-06-24T00:13:56.730Z