7 papers · 1 filter
Local virial relation and velocity anisotropy in self-gravitating system
Y. Sota, O. Iguchi, M. Morikawa +1
We investigate the merging process in N-body self-gravitating system from the viewpoints of the local virial relation which is the relation between the local kinetic energy and the…
Local virial relation for self-gravitating system
Osamu Iguchi, Yasuhide Sota, Akika Nakamichi +1
We demonstrate that the quasi-equilibrium state in self-gravitating -body system after cold collapse are uniquely characterized by the local virial relation using numerical simu…
Local virial relation and velocity anisotropy for collisionless self-gravitating systems
Y. Sota, O. Iguchi, M. Morikawa +1
The collisionless quasi-equilibrium state realized after the cold collapse of self-gravitating systems has two remarkable characters. One of them is the linear temperature-mass (TM…
Universal Non-Gaussian Velocity Distribution in Violent Gravitational Processes
O. Iguchi, Y. Sota, T. Tatekawa +2
We study the velocity distribution in spherical collapses and cluster-pair collisions by use of N-body simulations. Reflecting the violent gravitational processes, the velocity dis…
Linear Temperature-Mass relation and Local virial relation: Two hypotheses for self-gravitating systems
Y. Sota, O. Iguchi, M. Morikawa +1
We propose two hypotheses which characterize the quasi-equilibrium state that realizes after a cold collapse of self-gravitating system. The first hypothesis is the linear temperat…
Is Galaxy Distribution Non-extensive and Non-Gaussian?
Akika Nakamichi, Masahiro Morikawa
Self gravitating systems (SGS) in the Universe are generally thought to be non-extensive, and often show long-tails in various distribution functions. In principle, these non-Boltz…