Probing Cosmology with Weak Lensing Peak Counts (2009)
Kratochvil, Jan M., Haiman, Zoltán, May, Morgan
We propose counting peaks in weak lensing (WL) maps, as a function of their height, to probe models of dark energy and to constrain cosmological parameters. Because peaks can be identified in...
Constraining Cosmology with High Convergence Regions in Weak Lensing Surveys (2008)
Wang, Sheng, Haiman, Zoltán, May, Morgan
We propose to use a simple observable, the fractional area of "hot spots" in weak gravitational lensing mass maps which are detected with high significance, to determine background cosmological...
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...
Wang, Sheng, Hui, Lam, May, Morgan, Haiman, Zoltan
We apply the technique of parameter-splitting to existing cosmological data sets, to check for a generic failure of dark energy models. Given a dark energy parameter, such as the energy density...
High Shear Regions in Weak Lensing Surveys Determine Cosmology (2005)
Wang, Sheng, Haiman, Zoltan, May, Morgan, Kehayias, John
We propose to use a simple observable, the fractional area of "hot spots" in weak lensing mass maps which are detected with high significance, to determine background cosmological parameters. Because...
Weighing Neutrinos with Galaxy Cluster Surveys (2005)
Wang, Sheng, Haiman, Zoltan, Hu, Wayne, Khoury, Justin, May, Morgan
Large future galaxy cluster surveys, combined with cosmic microwave background observations, can achieve a high sensitivity to the masses of cosmologically important neutrinos. We show that a weak...
Constraining the Evolution of Dark Energy with a Combination of Galaxy Cluster Observables (2004)
Wang, Sheng, Khoury, Justin, Haiman, Zoltan, May, Morgan
We show that the abundance and redshift distribution ($dN/dz$) of galaxy clusters in future high--yield cluster surveys, combined with the spatial power spectrum ($P_c(k)$) of the same clusters, can...