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Hyperextended Cosmological Perturbation Theory: Predicting Non-linear Clustering Amplitudes
Roman Scoccimarro, Joshua A. Frieman
We consider the long-standing problem of predicting the hierarchical clustering amplitudes in the strongly non-linear regime of gravitational evolution. N-body results for th…
Redshift Distortions: Perturbative and N-body Results
Roman Scoccimarro
I discuss the evolution of the redshift-space bispectrum via perturbation theory (PT) and large high-resolution numerical simulations. At large scales, we give the multipole expans…
The Bispectrum as a Signature of Gravitational Instability in Redshift-Space
Roman Scoccimarro, H. M. P. Couchman, Joshua A. Frieman
The bispectrum provides a characteristic signature of gravitational instability that can be used to probe the Gaussianity of the initial conditions and the bias of the galaxy distr…
The Impact of Inhomogeneous Reionization on Cosmic Microwave Background Anisotropy
Lloyd Knox, Roman Scoccimarro, Scott Dodelson
Hydrogen atoms in the Universe that initially formed at redshift z = 1100 were reionized at 5 < z < 60. It is likely that this transition proceeded through a mixed phase of partial…