9 papers
Tidal torques dynamical friction and the structure of clusters of galaxies
A. Del Popolo, M. Gambera
We study the joint effect of tidal torques and dynamical friction on the collapse of density peaks solving numerically the equations of motion of a shell of barionic matter falling…
Non radial motions and the large scale structure of the Universe
A. Del Popolo, M. Gambera
We study the effect of non-radial motions on the mass function, the VDF and on the shape of clusters of galaxies using the model introduced in Del Popolo & Gambera (1998a,b; 1999).…
Density profiles of dark matter halos in an improved Secondary Infall model
A. Del Popolo, M. Gambera, E. Recami +1
In this paper we calculate the density profiles of virialized halos both in the case of structure evolving hierarchically from a scale-free Gaussian delta-field having a power spec…
Kuiper Belt evolution due to dynamical friction
A. Del Popolo, E. Spedicato, M. Gambera
In this paper we study the role of dynamical friction on the evolution of a population of large objects ( g) at heliocentric distances AU in the Kuiper Belt. We sh…
Analytical relations concerning the collapse time in hierarchically clustered cosmological models
M. Gambera, A. Pagliaro, -
By means of numerical methods, we solve the equations of motion for the collapse of a shell of baryonic matter, made of galaxies and substructure falling into the central regions o…
Small scale substructure, collapse time and dynamical friction
M. Gambera, A. Pagliaro
We solve numerically the equations of motion for the collapse of a shell of baryonic matter, made of galaxies and substructure of , taking into…