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4 papers · 2 filters
Stationary state in N-body System with power law interaction
Osamu Iguchi
Many self-gravitating systems often show scaling properties in their mass density, system size, velocities and so on. In order to clarify the origin of these scaling properties, we…
Negative skewness of radial pairwise velocity in the quasi-nonlinear regime: Zel'dovich approximation
A. Yoshisato, M. Morikawa, H. Mouri
According to N-body numerical simulations, the radial pairwise velocities of galaxies have negative skewness in the quasi-nonlinear regime. To understand its origin, we calculate t…
Extending Lagrangian perturbation theory to a fluid with velocity dispersion
Masaaki Morita, Takayuki Tatekawa
We formulate a perturbative approximation to gravitational instability, based on Lagrangian hydrodynamics in Newtonian cosmology. We take account of `pressure' effect of fluid, whi…
On the Power Spectrum Density of Gamma Ray Bursts
Motoko Suzuki, Masahiro Morikawa, Izumi Joichi
Gamma ray bursts (GRBs) are known to have short-time variability and power-law behavior with the index -1.67 in the power spectrum density. Reanalyzing the expanded data, we have f…