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Effect of Peculiar Motion in Weak Lensing
Camille Bonvin
We study the effect of peculiar motion in weak gravitational lensing. We derive a fully relativistic formula for the cosmic shear and the convergence in a perturbed Friedmann Unive…
Generalized Einstein-Aether theories and the Solar System
Camille Bonvin, Ruth Durrer, Pedro G. Ferreira +2
It has been shown that generalized Einstein-Aether theories may lead to significant modifications to the non-relativistic limit of the Einstein equations. In this paper we study th…
Superluminal motion and closed signal curves
Camille Bonvin, Chiara Caprini, Ruth Durrer
We discuss some properties of Lorentz invariant theories which allow for superluminal motion. We show that, if signals are always sent forward in time, closed curves along which si…
No-go theorem for k-essence dark energy
Camille Bonvin, Chiara Caprini, Ruth Durrer
We demonstrate that if k-essence can solve the coincidence problem and play the role of dark energy in the universe, the fluctuations of the field have to propagate superluminally…
Dipole of the luminosity distance: a direct measure of H(z)
Camille Bonvin, Ruth Durrer, Martin Kunz
We show that the dipole of the luminosity distance is a useful observational tool which allows us to determine the Hubble parameter as a function of the redshift H(z). We determine…
Fluctuations of the luminosity distance
Camille Bonvin, Ruth Durrer, M. Alice Gasparini
We derive an expression for the luminosity distance in a perturbed Friedmann universe. We define the correlation function and the power spectrum of the luminosity distance fluctuat…