Cosmic Constraints on Holographic Dark Energy in Brans-Dicke Theory [article]

Lixin Xu, Jianbo Lu, Wenbo Li
2009 arXiv   pre-print
In this paper, the holographic dark energy in Brans-Dicke theory is confronted by cosmic observations from SN Ia, BAO and CMB shift parameter. The best fit parameters are found in 1σ region: Ω_h0=0.683^+0.035_-0.038, c=0.605^+0.138_-0.107 and α=0.00662^+0.00477_-0.00467 (equivalently ω=905.690^+637.906_-651.471 which is less the solar system bound and consistent with other constraint results). With these best fit values of the parameters, it is found the universe is undergoing accelerated
more » ... ion, and the current value of equation of state of holographic dark energy w_h0=-1.246^+0.191_-0.144 which is phantom like in Brans-Dicke theory. The evolution of effective Newton's constant is also explored.
arXiv:0905.4174v1 fatcat:gtctmx3asraqjf42xoadhuxl4e