153 citations · 441 across the 8 of their papers we have counts for
8 papers · 1 filter
Dark energy and neutrino mass constraints from weak lensing, supernova, and relative galaxy ages
Yan Gong, Tong-Jie Zhang, Tian Lan +1
We use the current weak lensing data to constrain the equation of state of dark energy and the total mass of massive neutrinos . The constraint on would be weak i…
Cosmological Constraints on Invisible Decay of Dark Matter
Yan Gong, Xuelei Chen
The cold dark matter may be in a meta-stable state and decays to other particles with a very long lifetime. If the decaying products of the dark matter are weakly interacting, e.g.…
Probing the Intrinsic Shape and Alignment of Dark Matter Haloes using SDSS Galaxy Groups
Yougang Wang, Xiaohu Yang, H. J. Mo +4
We study the three-dimensional and projected shapes of galaxy groups in the Sloan Digital Sky Survey Data Release 4, and examine the alignment between the orientation of the centra…
Type Ia supernovae as speed sensors at intermediate redshifts
Pengjie Zhang, Xuelei Chen
The application of large scale peculiar velocity (LSPV), as a crucial probe of dark matter, dark energy and gravity, is severely limited by measurement obstacles. We show that fluc…
Two Component Model of Dark Energy
Yan Gong, Xuelei Chen
We consider the possibility that the dark energy is made up of two or more independent components, each having a different equation of state. We fit the model with supernova and ga…
Contraints on radiative dark-matter decay from the cosmic microwave background
Le Zhang, Xuelei Chen, Marc Kamionkowski +2
If dark matter decays to electromagnetically-interacting particles, it can inject energy into the baryonic gas and thus affect the processes of recombination and reionization. This…