Origin of Core-Halo Structure in One-Dimensional Self-Gavitating System

Details Origin of Core-Halo Structure in One-Dimensional Self-Gavitating System Origin of Core-Halo Structure in One-Dimensional Self-Gavitating System

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pthph..88..269y&link_type=abstract

Progress of Theoretical Physics Volume 88 pp.269-282

Physics

15

Scientific paper

The relaxation process of self-gravitating systems is examined by using one-dimensional numerical simulation. We get the asymptotic distribution function which disagrees with that proposed by Lynden-Bell. Our distribution function has two peaks in low and high energy regions and a valley in the medium energy region. This characteristic core-halo structure in phase space has been observed in many simulations. We clarify the dynamical mechanism which generates this `core-halo' structure. The essence of this mechanism is that the elements of the system are accelerated (or decelerated) very effectively by the evolving gravitational potential in a specific energy region, reflecting the initial conditions.

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