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Testable dark energy predictions from current data
Michael J. Mortonson, Wayne Hu, Dragan Huterer
Given a class of dark energy models, constraints from one set of cosmic acceleration observables make predictions for other observables. Here we present the allowed ranges for the…
Spherical Collapse and the Halo Model in Braneworld Gravity
Fabian Schmidt, Wayne Hu, Marcos Lima
We present a detailed study of the collapse of a spherical perturbation in DGP braneworld gravity for the purpose of modeling simulation results for the halo mass function, bias an…
Generalized Slow Roll for Large Power Spectrum Features
Cora Dvorkin, Wayne Hu
We develop a variant of the generalized slow roll approach for calculating the curvature power spectrum that is well-suited for order unity deviations in power caused by sharp feat…
Cluster Constraints on f(R) Gravity
Fabian Schmidt, Alexey Vikhlinin, Wayne Hu
Modified gravitational forces in models that seek to explain cosmic acceleration without dark energy typically predict deviations in the abundance of massive dark matter halos. We…
Hiding dark energy transitions at low redshift
Michael J. Mortonson, Wayne Hu, Dragan Huterer
We show that it is both observationally allowable and theoretically possible to have large fluctuations in the dark energy equation of state as long as they occur at ultra-low reds…
Evidence for horizon-scale power from CMB polarization
Michael J. Mortonson, Wayne Hu
The CMB temperature power spectrum offers ambiguous evidence for the existence of horizon-scale power in the primordial power spectrum due to uncertainties in spatial curvature and…