Inhomogeneous Viscous Fluids in a Friedmann-Robertson-Walker (FRW) Universe

2013/07/09 by Ratbay Myrzakulov, R. Myrzakulov, Lorenzo Sebastiani +3
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #gr-qc

paper · pdf · doi:10.3390/galaxies1020083

published as Galaxies, v.1, N2, 83-95 (2013) · 11 pages, references added; Galaxies 2013, 1

openalex publication_date 2013/07/09 · arxiv created 2013/07/23 · arxiv updated 2013/11/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We give a brief review of some aspects of inhomogeneous viscous fluids in a flat Friedmann-Robertson-Walker Universe. In general, it is pointed out that several fluid models may bring the future Universe evolution to become singular, with the appearance of the so-called Big Rip scenario. We investigate the effects of fluids coupled with dark matter in a de Sitter Universe, by considering several cases. Due to this coupling, the coincidence problem may be solved, and if the de Sitter solution is stable, the model is also protected against the Big Rip singularity.

Citations

• Phantom Energy: Dark Energy withw<−1Causes a Cosmic Doomsday
• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• Measurements of Ω and Λ from 42 High‐Redshift Supernovae
• Extended Theories of Gravity and their Cosmological and Astrophysical Applications
• Beyond the perfect fluid hypothesis for the dark energy equation of state
• Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Is cosmic speed-up due to new gravitational physics?
• Three‐YearWilkinson Microwave Anisotropy Probe(WMAP) Observations: Implications for Cosmology
• FIVE-YEARWILKINSON MICROWAVE ANISOTROPY PROBEOBSERVATIONS: COSMOLOGICAL INTERPRETATION