153 citations · 648 across the 18 of their papers we have counts for
18 papers
Causal Gravitational-Wave Production Does Not Generate Infrared Adiabatic Curvature
Ruth Durrer, Alessandro Melchiorri
Short tensor modes can generate a white noise contribution to the local scalar , but this does not induce an infrared-enhanced adiabatic curvature spectrum. For a c…
Cosmological perturbations and the transition from contraction to expansion
C. Cartier, R. Durrer, E. J. Copeland
We investigate both analytically and numerically the evolution of scalar perturbations generated in models which exhibit a smooth transition from a contracting to an expanding Frie…
Adiabatic perturbations in pre big bang models: matching conditions and scale invariance
R. Durrer, F. Vernizzi
At low energy, the four-dimensional effective action of the ekpyrotic model of the universe is equivalent to a slightly modified version of the pre big bang model. We discuss cosmo…
Acoustic peaks and dips in the CMB power spectrum: observational data and cosmological constraints
R. Durrer, B. Novosyadlyj, S. Apunevych
The locations and amplitudes of three acoustic peaks and two dips in the last releases of the Boomerang, MAXIMA and DASI measurements of the cosmic microwave background (CMB) aniso…
Reproducing the observed Cosmic microwave background anisotropies with causal scaling seeds
R. Durrer, M. Kunz, A. Melchiorri
During the last years it has become clear that global O(N) defects and U(1) cosmic strings do not lead to the pronounced first acoustic peak in the power spectrum of anisotropies o…
Constraints on the tensor mode from large scale structure observations
B. Novosyadlyj, R. Durrer, S. Apunevych
Observational data on the large scale structure (LSS) of the Universe are used to establish an upper limit for the amplitude of the tensor mode marginalized over all other cosmolog…