162 citations · 246 across the 9 of their papers we have counts for
9 papers
BiGONLight: light propagation with bi-local operators in Numerical Relativity
Michele Grasso, Eleonora Villa
BiGONLight, Bi-local Geodesic Operators framework for Numerical Light propagation, is a new tool for light propagation in Numerical Relativity. The package implements the Bi-local…
Isolating non-linearities of light propagation in inhomogeneous cosmologies
Michele Grasso, Eleonora Villa, Mikołaj Korzyński +1
A new formulation for light propagation in geometric optics by means of the Bi-local Geodesic Operators is considered. We develop the BiGONLight Mathematica package, uniquely desig…
Geometric optics in relativistic cosmology: new formulation and a new observable
Mikołaj Korzyński, Eleonora Villa
We discuss a new formalism for light propagation which can be used within the regime of validity of geometric optics, but with no limitation on the scales of interest: from inside…
Quasilinear observables in dark energy cosmologies
Cornelius Rampf, Eleonora Villa, Luca Amendola
What are the fundamental limitations of reconstructing the properties of dark energy, given cosmological observations in the quasilinear regime in a range of redshifts, to be as pr…
Lagrangian theory for cosmic structure formation with vorticity: Newtonian and post-Friedmann approximations
Cornelius Rampf, Eleonora Villa, Daniele Bertacca +1
We study the nonlinear gravitational dynamics of a universe filled with a pressureless fluid and a cosmological constant in the context of Newtonian gravity, and in the relativ…
Relativistic perturbations in CDM: Eulerian & Lagrangian approaches
Eleonora Villa, Cornelius Rampf
We study the relativistic dynamics of a pressure-less and irrotational fluid of dark matter (CDM) with a cosmological constant (), up to second order in cosmological perturbatio…
General relativistic corrections and non-Gaussianity in large scale structure
Eleonora Villa, Licia Verde, Sabino Matarrese
General relativistic cosmology cannot be reduced to linear relativistic perturbations superposed on an isotropic and homogeneous (Friedmann-Robertson-Walker) background, even thoug…
Stellar Clusters in M83: Formation, evolution, disruption and the influence of environment
N. Bastian, A. Adamo, M. Gieles +6
We study the stellar cluster population in two adjacent fields in the nearby, face-on spiral galaxy, M83, using WFC3/HST imaging. The clusters are selected through visual inspectio…
Post-Newtonian cosmological dynamics of plane-parallel perturbations and back-reaction
Eleonora Villa, Sabino Matarrese, Davide Maino
We study the general relativistic non-linear dynamics of self-gravitating irrotational dust in a cosmological setting, adopting the comoving and synchronous gauge, where all the eq…