Cosmological Constraints on DGP Braneworld Gravity with Brane Tension (2009)
Lombriser, Lucas, Hu, Wayne, Fang, Wenjuan, Seljak, Uros
We perform a Markov Chain Monte Carlo analysis of the self-accelerating and normal branch of Dvali-Gabadadze-Porrati braneworld gravity. By adopting a parameterized post-Friedmann description of...
Crossing the Phantom Divide with Parameterized Post-Friedmann Dark Energy (2008)
Fang, Wenjuan, Hu, Wayne, Lewis, Antony
Dark energy models with a single scalar field cannot cross the equation of state divide set by a cosmological constant. More general models that allow crossing require additional degrees of freedom...
Challenges to the DGP Model from Horizon-Scale Growth and Geometry (2008)
Fang, Wenjuan, Wang, Sheng, Hu, Wayne, Haiman, Zoltan, Hui, Lam, May, Morgan
We conduct a Markov Chain Monte Carlo study of the Dvali-Gabadadze-Porrati (DGP) self-accelerating braneworld scenario given the cosmic microwave background (CMB) anisotropy, supernovae and Hubble...
An Evolving Entropy Floor in the Intracluster Gas? (2007)
Non-gravitational processes, such as feedback from galaxies and their active nuclei, are believed to have injected excess entropy into the intracluster gas, and therefore to have modified the density...
We study the potential of a large future weak-lensing survey to constrain dark energy properties by using both the number counts of detected galaxy clusters (sensitive primarily to density...