11 papers · 1 filter
Propagators in Lagrangian space
Francis Bernardeau, Patrick Valageas
It has been found recently that propagators, e.g. the cross-correlation spectra of the cosmic fields with the initial density field, decay exponentially at large-k in an Eulerian d…
Construction of the one-point PDF of the local aperture mass in weak lensing maps
F. Bernardeau, P. Valageas
We present a general method for the reconstruction of the one-point Probability Distribution Function of the local aperture mass in weak lensing maps. Exact results, that neglect t…
Statistical properties of the convergence due to weak gravitational lensing by non-linear structures
P. Valageas
Density fluctuations in the matter distribution lead to distortions of the images of distant galaxies through weak gravitational lensing effects. This provides an efficient probe o…
Multiplicity Functions and X-ray emission of Clusters and Groups versus Galaxies and Quasars
P. Valageas, R. Schaeffer
We use a unified analytical formulation for the multiplicity functions of clusters and galaxies which is free from the cloud-in-cloud problem encountered in earlier approaches and…
The entropy history of the universe
P. Valageas, J. Silk
Using a unified analytic model for quasars, galaxies, Lyman-alpha absorbers and the IGM, we obtain the redshift evolution of the temperature and the entropy of the gas and the corr…
Non-linear gravitational clustering: smooth halos, substructures and scaling exponents
P. Valageas
Within the framework of hierarchical clustering scenarios, we investigate the consequences for the properties of virialized halos of the constraints provided by numerical simulatio…