The Dynamic Cosmological Term $Λ$: Some Aspects of Phenomenological Models

Details The Dynamic Cosmological Term $Λ$: Some Aspects of Phenomenological Models The Dynamic Cosmological Term $Λ$: Some Aspects of Phenomenological Models

2005-10-19

arxiv.org/abs/astro-ph/0510554v1

N. B. U. Math.J. II:51,2009

Astronomy and Astrophysics

Astrophysics

Latex, 9 pages

Scientific paper

Choosing a phenomenological model of $\Lambda$, viz. $\Lambda \sim \dot H$, it has been shown that this model of $\Lambda$ is equivalent to other three types of $\Lambda$, $\Lambda \sim (\dot a/a)^2$, $\Lambda \sim \ddot a/a$ and $\Lambda \sim \rho$. Through an indirect approach, it has also been possible to put a limit on the deceleration parameter $q$. It has been shown that if $q$ becomes less than -1, then this model can predict about the presence of phantom energy.

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