111 citations · 294 across the 9 of their papers we have counts for
5 papers · 1 filter
Lensing and Supernovae: Quantifying The Bias on the Dark Energy Equation of State
Devdeep Sarkar, Alexandre Amblard, Daniel E. Holz +1
The gravitational magnification and demagnification of Type Ia supernovae (SNe) modify their positions on the Hubble diagram, shifting the distance estimates from the underlying lu…
Beyond Two Dark Energy Parameters
Devdeep Sarkar, Scott Sullivan, Shahab Joudaki +3
Our ignorance of the dark energy is generally described by a two-parameter equation of state. In these approaches a particular {\it ad hoc} functional form is assumed, and only two…
CMB Cluster Lensing: Cosmography with the Longest Lever Arm
Wayne Hu, Daniel E. Holz, Chris Vale
We discuss combining gravitational lensing of galaxies and the cosmic microwave background (CMB) by clusters to measure cosmographic distance ratios, and hence dark energy paramete…
Narrowing Constraints with Type Ia Supernovae: Converging on a Cosmological Constant
Scott Sullivan, Asantha Cooray, Daniel E. Holz
We apply a parameterization-independent approach to fitting the dark energy equation-of-state (EOS). Utilizing the latest type Ia supernova data, combined with results from the cos…
Close Pairs as Proxies for Galaxy Cluster Mergers
Andrew R. Wetzel, A. E. Schulz, Daniel E. Holz +1
Galaxy cluster merger statistics are an important component in understanding the formation of large-scale structure. Unfortunately, it is difficult to study merger properties and e…