L.R.S. Bianchi type II stiff fluid cosmological model with decaying vacuum energy density Λ in general relativity
Year: 2011
Type: article
Abstract: Locally rotationally symmetric (L.R.S.) Bianchi type II stiff fluid cosmological model is investigated. To get the deterministic model of the universe, we have assumed a supplementary condition A=Bm between metric potentials A and B, where m is a constant. It is shown that the vacuum energy density Λ is positive and proportional to 1t2. The values of deceleration parameter q, matter-energy density Ωm and dark-energy density ΩΛ are found to be in good agreement with the values obtain from 5-years WMAP observations. The predicted value of the jerk parameter is in agreement with the SNLS SNIa and X-ray galaxy cluster distance data but it is not match with the SNIa gold sample data. In general, the model represent accelerating, shearing and non-rotating universe. The physical and geometrical behavior of this model is also discussed.
Source: Physics Letters B
Author: Hassan Amirhashchi
Institution: Islamic Azad University Mahshahr
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid:
Funder: Islamic Azad University
OpenAlex ID: W1982423519