Cosmic Constraints on Holographic Dark Energy in Brans-Dicke Theory - Astrophysics > Cosmology and Nongalactic AstrophysicsReport as inadecuate




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Abstract: In this paper, the holographic dark energy in Brans-Dicke theory isconfronted by cosmic observations from SN Ia, BAO and CMB shift parameter. Thebest fit parameters are found in $1\sigma$ region:$\Omega {h0}=0.683^{+0.035} {-0.038}$, $c=0.605^{+0.138} {-0.107}$ and$\alpha=0.00662^{+0.00477} {-0.00467}$ equivalently$\omega=905.690^{+637.906} {-651.471}$ which is less the solar system bound andconsistent with other constraint results. With these best fit values of theparameters, it is found the universe is undergoing accelerated expansion, andthe 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.



Author: Lixin Xu, Jianbo Lu, Wenbo Li

Source: https://arxiv.org/







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