9 citations · 9 across the 3 of their papers we have counts for
7 papers
Fully Degenerate Self-Gravitating Fermionic Dark Matter: Implications to the Density Profile of the Cluster of Galaxies A1689, and the Mass Hierarchy of Black Holes
Tadashi Nakajima, Masahiro Morikawa
Equilibrium configurations of weakly interacting fully degenerate fermionic dark matter are considered at various scales in the Universe. We treat the general situations for the gr…
Bose Einstein Condensation as Dark Energy and Dark Matter
Masako Nishiyama, Masa-aki Morita, Masahiro Morikawa
We study a cosmological model in which the boson dark matter gradually condensates into dark energy. Negative pressure associated with the condensate yields the accelerated expansi…
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…
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…
Galaxy Distributions and Tsallis Statistical Mechanics
Akika Nakamichi, Izumi Joichi, Osamu Iguchi +1
Large-scale astrophysical systems are non-extensive due to their long-range force of gravity. Here we show an approach toward the statistical mechanics of such self-gravitating sys…
Dissipative Quantum Tunneling from Quantum Potential Approach -- Back Reaction of Particle Creation --
Fumiaki Shibata, Masahiro Morikawa, Tetsuya Shiromizu +1
Back reaction of the particle creation on the quantum tunneling process is analyzed in real time formalism. We use quantum potential method in which whole quantum dynamics is exact…