The effect of tidal fields on the shapes and kinematics of dark halos

Details The effect of tidal fields on the shapes and kinematics of dark halos The effect of tidal fields on the shapes and kinematics of dark halos

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993egte.conf...72d&link_type=abstract

In NASA. Ames Research Center, The Evolution of Galaxies and Their Environment p 72-73 (SEE N93-26706 10-90)

Statistics

Applications

Angular Momentum, Computerized Simulation, Cosmology, Dark Matter, Galactic Structure, Halos, Many Body Problem, Perturbation Theory, Shapes, Shear Flow, Tides, Applications Programs (Computers), Time Dependence

Scientific paper

We have carried out a series of N-body simulations to investigate the effect of tidal shear on the structure and kinematics of dark halos. We simulate the collapse of density perturbations using a tree code as described in Dubinski & Carlberg (1991). Density peaks are selected from a random realization of a CDM density field and used as the initial conditions for N-body simulations. We use an experimental approach to examine the effects of tidal shear on collapse. The cosmological tidal field is treated as an external time dependent potential whose strength and orientation can be varied freely. We examine the effects of the tidal field with two experiments. In the first experiment, we simulate a sample of 14 dark halos from the collapse of density peaks in the presence of a 1(sigma) tidal field. In the second experiment, we use the same initial conditions though the tidal field is turned off allowing an experimental control for comparison to highlight the influence of tidal shear on the development of the structure and kinematics of the dark halos.

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