Merger Rate Distribution of Primordial Black Hole Binaries
- Zu-Cheng Chen, Q. Huang
- PhysicsAstrophysical Journal
- 31 January 2018
Up to now several gravitational-wave events from the coalescences of black hole binaries have been reported by LIGO/VIRGO, and imply that black holes should have an extended mass function. We work…
Distance priors from Planck final release
We present the distance priors from the finally released Planck TT, TE, EE+lowE data in 2018. The uncertainties are around 40% smaller than those from Planck 2015 TT+lowP. In order to check the…
The holographic dark energy in a non-flat universe
We study the model for holographic dark energy in a spatially closed universe, generalizing the proposal in hep-th/0403127 for a flat universe. We provide independent arguments for the choice of the…
A polynomial f(R) inflation model
- Q. Huang
- Physics
- 13 September 2013
Motivated by the ultraviolet complete theory of quantum gravity, for example the string theory, we investigate a polynomial f(R) inflation model in detail. We calculate the spectral index and…
Mass-varying massive gravity
- Q. Huang, Yun-song Piao, Shuang-Yong Zhou
- Physics, Geology
- 25 June 2012
It has recently been shown that the graviton can consistently gain a constant mass without introducing the Boulware-Deser ghost. We propose a gravity model where the graviton mass is set by a scalar…
An accurate determination of the Hubble constant from baryon acoustic oscillation datasets
- Cheng Cheng, Q. Huang
- Physics
- 22 September 2014
Even though the Hubble constant cannot be significantly determined just by the low-redshift Baryon Acoustic Oscillation (BAO) data, it can be tightly constrained once the high-redshift BAO data are…
Fitting the constitution type Ia supernova data with the redshift-binned parametrization method
- Q. Huang, Miao Li, Xiao-Dong Li, Shuang Wang
- Physics
- 6 May 2009
In this work, we explore the cosmological consequences of the recently released Constitution sample of 397 Type Ia supernovae (SNIa). By revisiting the Chevallier-Polarski-Linder (CPL)…
Confronting brane inflation with Planck and pre-Planck data
- Yin-Zhe Ma, Q. Huang, Xin Zhang
- Physics
- 25 March 2013
In this paper, we compare brane inflation models with the Planck data and the pre-Planck data (which combines WAMP, ACT, SPT, BAO and H-0 data). The Planck data prefer a spectral index less than…
THE COSMOLOGICAL CONSTANT PROBLEM AND INFLATION IN THE STRING LANDSCAPE
An earlier paper points out that a quantum treatment of the string landscape is necessary. It suggests that the wave function of the universe is mobile in the landscape until the universe reaches a…
Growth factor in $f(T)$ gravity
We derive the evolution equation of growth factor for the matter over-dense perturbation in f(T) gravity. For instance, we investigate its behavior in power law model at small redshift and compare it…
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