4 papers · 1 filter
Dynamical models and numerical simulations of incomplete violent relaxation
M. Trenti, G. Bertin
N-body simulations of collisionless collapse have offered important clues to the construction of realistic stellar dynamical models of elliptical galaxies. Such simulations confirm…
A class of self-gravitating accretion disks
G. Bertin, G. Lodato
We consider a class of steady-state self-gravitating accretion disks for which efficient cooling mechanisms are assumed to operate so that the disk is self-regulated at a condition…
Weak lensing and cosmology
Marco Lombardi, Giuseppe Bertin
Recently, it has been shown that it is possible to reconstruct the projected mass distribution of a cluster from weak lensing provided that both the geometry of the universe and th…
Improving the accuracy of mass reconstructions from weak lensing: from the shear map to the mass distribution
Marco Lombardi, Giuseppe Bertin
In this paper we provide a statistical analysis of the parameter-free method often used in weak lensing mass reconstructions. It is found that a proper assessment of the errors inv…