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8 papers · 2 filters
Noether Symmetry Approach in "Cosmic Triad" Vector Field Scenario
Yi Zhang, Yun-gui Gong, Zong-Hong Zhu
To realize the accelerations in the early and late periods of our universe, we need to specify potentials for the dominant fields. In this paper, by using the Noether symmetry appr…
Constraints on Cosmological Models and Reconstructing the Acceleration History of the Universe with Gamma-Ray Burst Distance Indicators
Nan Liang, Puxun Wu, Shuang Nan Zhang
Gamma-ray bursts (GRBs) have been regarded as standard candles at very high redshift for cosmology research. We have proposed a new method to calibrate GRB distance indicators with…
Constraints on Cardassian universe from Gamma ray bursts
Tai-Shan Wang, Nan Liang
Constraints on the original Cardassian model and the modified polytropic Cardassian model are examined from the recently derived 42 gamma-ray bursts (GRBs) data calibrated with the…
Cosmological Implications of 5-dimensional Brans-Dicke Theory
Li-e Qiang, Yan Gong, Yongge Ma +1
The five dimensional Brans-Dicke theory naturally provides two scalar fields by the Killing reduction mechanism. These two scalar fields could account for the accelerated expansion…
Observational constraint on dynamical evolution of dark energy
Yungui Gong, Rong-Gen Cai, Yun Chen +1
We use the Constitution supernova, the baryon acoustic oscillation, the cosmic microwave background, and the Hubble parameter data to analyze the evolution property of dark energy.…
Does Unruh radiation accelerate the universe? A novel approach to the cosmic acceleration
Hongsheng Zhang, Hyerim Noh, Zong-Hong Zhu +1
We present a novel mechanism for the present acceleration of the universe. We find that the temperature of the Unruh radiation perceived by the brane is not equal to the inherent t…