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21 papers · 2 filters
Testing the phenomenological interacting dark energy with observational data
Shuo Cao, Nan Liang, Zong-Hong Zhu
In order to test the possible interaction between dark energy and dark matter, we investigate observational constraints on a phenomenological scenario, in which the ratio between t…
Information Content in the Angular Power Spectrum of Weak Lensing: Wavelet Method
Hao-Ran Yu, Joachim Harnois-Déraps, Tong-Jie Zhang +1
We quantify the performance of a non-linear Wiener filter, constructed in wavelet space, at recovering some of the Fisher information that was lost in the weak lensing convergence…
Combining Optical and X-ray Observations of Galaxy Clusters to Constrain Cosmological Parameters
Heng Yu, Zong-Hong Zhu
Galaxy clusters have their unique advantages for cosmology. Here we collect a new sample of 10 lensing galaxy clusters with X-ray observations to constrain cosmological parameters.…
Observational Constraints on Interacting Dark Matter Model Without Dark Energy
Shuo Cao, Zong-Hong Zhu, Nan Liang
The interacting dark matter (IDM) scenario allows for the acceleration of the Universe without Dark Energy. We constrain the IDM model by using the newly revised observational data…
A Series Solution to the Luminosity Distance in a Flat LCDM Universe
De-Zi Liu, Nan-Nan Yue, Xiao-Lei Meng +2
Cosmological observations indicate that our universe is flat and dark energy (DE) dominated at present. The luminosity distance plays an important role in the investigation of the…
Cosmological Constraints on the DGP braneworld model with Gamma-ray bursts
Nan Liang, Zong-Hong Zhu
We investigate observational constraints on the Dvali, Gabadadze and Porrati (DGP) model with Gamma-ray bursts (GRBs) at high redshift obtained directly from the Union2 Type Ia sup…