Time variable cosmological constant of holographic origin with interaction in Brans-Dicke theory

Details Time variable cosmological constant of holographic origin with interaction in Brans-Dicke theory Time variable cosmological constant of holographic origin with interaction in Brans-Dicke theory

2012-03-22

arxiv.org/abs/1203.4906v1

International Journal of Modern Physics D, 21(1): 1250005,2012

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

10 pages, 9 figures

Scientific paper

Time variable cosmological constant (TVCC) of holographic origin with interaction in Brans-Dicke theory is discussed in this paper. We investigate some characters for this model, and show the evolutions of deceleration parameter and equation of state (EOS) for dark energy. It is shown that in this scenario an accelerating universe can be obtained and the evolution of EOS for dark energy can cross over the boundary of phantom divide. In addition, a geometrical diagnostic method, jerk parameter is applied to this model to distinguish it with cosmological constant.

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