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The Large Scale Structure of f(R) Gravity
Yong-Seon Song, Wayne Hu, Ignacy Sawicki
We study the evolution of linear cosmological perturbations in f(R) models of accelerated expansion in the physical frame where the gravitational dynamics are fourth order and the…
Report of the Dark Energy Task Force
Andreas Albrecht, Gary Bernstein, Robert Cahn +10
Dark energy appears to be the dominant component of the physical Universe, yet there is no persuasive theoretical explanation for its existence or magnitude. The acceleration of th…
Supernovae, Lensed CMB and Dark Energy
Wayne Hu, Dragan Huterer, Kendrick M. Smith
Supernova distance and primary CMB anisotropy measurements provide powerful probes of the dark energy evolution in a flat universe but degrade substantially once curvature is margi…
Cosmological Information from Lensed CMB Power Spectra
Kendrick M. Smith, Wayne Hu, Manoj Kaplinghat
Gravitational lensing distorts the cosmic microwave background (CMB) temperature and polarization fields and encodes valuable information on distances and growth rates at intermedi…
The Maximum B-mode Polarization of the Cosmic Microwave Background from Inhomogeneous Reionization
Michael J. Mortonson, Wayne Hu
We compute the B-mode polarization power spectrum of the CMB from an epoch of inhomogeneous reionization, using a simple model in which HII regions are represented by ionized spher…
Large-Scale Tests of the DGP Model
Yong-Seon Song, Ignacy Sawicki, Wayne Hu
The self-accelerating braneworld model (DGP) can be tested from measurements of the expansion history of the universe and the formation of structure. Current constraints on the exp…