2016/07/25 by Luis Avilés, Patricio Mella, Avilés, Luis +6
Earth and Planetary Sciences · Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #Geophysics and Gravity Measurements #astro-ph.CO #gr-qc
paper · pdf · doi:10.48550/arxiv.1607.07137
8 figures
arxiv created 2016/07/25 · openalex publication_date 2016/07/25 · arxiv updated 2016/07/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this paper we find new solutions for the so called Einstein-Chern-Simons Friedmann-Robertson-Walker field equations studied in refs. (Phys. Rev. D 84 (2011) 063506, Eur. Phys. J. C 74 (2014) 3087). We consider three cases:(i) in the first case we find some solutions of the five-dimensional ChS-FRW field equations when the ha field is a perfect fluid that obeys a barotropic equation of state; (ii) in the second case we study the solutions, for the cases γ=1/2, 3/4, when the ha field is a five dimensional politropic fluid that obeys the equation P(h)=ω(h)ρ(h)γ; (iii) in the third case we find the scale factor and the state parameter ω(t) when the ha field is a variable modified Chaplygin gas. We consider also a space-time metric which contains as a subspace to the usual four-dimensional FRW and then we study the same three cases considered in the five-dimensional, namely when (i) the ha field is a perfect fluid, (ii) the ha field is a five dimensional politropic fluid and (iii) the ha field is a variable modified Chaplygin gas.