Accelerating universe with decreasing gravitational constant
Sign Up to like & getrecommendations! Published in 2020 at "Journal of King Saud University - Science"
DOI: 10.1016/j.jksus.2019.11.042
Abstract: Abstract We study the cosmology of dark energy in an extended theory of gravity in Lyra’s geometry. By analyzing a possible phenomenological interaction between the matter field with a constant equation-of-state parameter ω m (… read more here.
Keywords: universe decreasing; gravitational constant; time; geometry ... See more keywords
Accelerating universe with varying Λ in ( ) theory of gravity
Sign Up to like & getrecommendations! Published in 2021 at "New Astronomy"
DOI: 10.1016/j.newast.2020.101476
Abstract: Abstract In this paper we have investigated Bianchi Type- I cosmological model with varying cosmological constant Λ in f(R, T) theory of gravity. In order to obtain an exact solution of the field equations, we… read more here.
Keywords: universe varying; varying theory; theory gravity; model ... See more keywords
Strong evidence for an accelerating Universe
Sign Up to like & getrecommendations! Published in 2017 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/201730469
Abstract: A recent analysis of supernova Ia (SN Ia) data claims a “marginal” (~ 3 σ ) evidence for a cosmic acceleration. This result has been complemented with a non-accelerating R h = ct cosmology, which… read more here.
Keywords: cosmology; analysis; evidence; accelerating universe ... See more keywords
Equation of state and background geometry for the accelerating universe
Sign Up to like & getrecommendations! Published in 2018 at "Modern Physics Letters A"
DOI: 10.1142/s021773231850219x
Abstract: By using the observational data, we show that the background geometry for both the early inflation and present accelerating universe can be quasi-de Sitter form containing cosmic fluid with equation of state [Formula: see text],… read more here.
Keywords: see text; formula see; geometry; accelerating universe ... See more keywords