Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Hozumi, Shunsuke"'
A fast $N$-body code has been developed for simulating a stellar disk embedded in a live dark matter halo. In generating its Poisson solver, a self-consistent field (SCF) code which inherently possesses perfect scalability is incorporated into a tree
Externí odkaz:
http://arxiv.org/abs/2302.11794
Autor:
Hozumi, Shunsuke
The properties of the bars formed by the bar instability are examined for flat stellar discs. The initial mass models chosen are Kuzmin--Toomre discs, for which two types of exact equilibrium distribution function (DF) are employed in order to realiz
Externí odkaz:
http://arxiv.org/abs/2112.09378
We present a mean-field approach to simulating merging processes of two spherical collisionless stellar systems. This approach is realized with a self-consistent field (SCF) method in which the full spatial dependence of the density and potential of
Externí odkaz:
http://arxiv.org/abs/1903.03138
Autor:
Shin, Jihye, Kim, Sungsoo S., Baba, Junichi, Saitoh, Takayuki R., Hwang, Jeong-Sun, Chun, Kyungwon, Hozumi, Shunsuke
We present hydrodynamic simulations of gas clouds inflowing from the disk to a few hundred parsec region of the Milky Way. A gravitational potential is generated to include realistic Galactic structures by using thousands of multipole expansions that
Externí odkaz:
http://arxiv.org/abs/1704.09006
Autor:
Hozumi, Shunsuke, Burkert, Andreas
The formation and evolution of tidal tails like those observed around some globular clusters and dwarf satellite galaxies is examined with an N-body simulation. In particular, we analyse in detail the evolving tidal features of a one-component satell
Externí odkaz:
http://arxiv.org/abs/1409.2157
Autor:
Hozumi, Shunsuke
The characteristics of the galactic bars that are prone to suffer a damaging impact from a massive central black hole are examined using flat stellar disks. We construct three disk model groups that consist of exponential disks with one type of veloc
Externí odkaz:
http://arxiv.org/abs/1108.2600
Autor:
Ideta, Makoto, Hozumi, Shunsuke
Publikováno v:
Astrophys.Space Sci. 284 (2003) 531-534
The time evolution of barred structures is examined under the influence of the external forces exerted by a spherical halo and by prolate halos. In particular, galaxy disks are placed in the plane including the major axis of prolate halos, whose conf
Externí odkaz:
http://arxiv.org/abs/astro-ph/0005054
A recent observation with the Hipparcos satellite and some numerical simulations imply that the interaction between an oblate halo and a disc is inappropriate for the persistence of galactic warps. Then, we have compared the time evolution of galacti
Externí odkaz:
http://arxiv.org/abs/astro-ph/9910030
Autor:
Hozumi, Shunsuke, Hernquist, Lars
The influence of central black holes on the dynamical evolution of bars in disk galaxies is examined. In particular, we use numerical simulation to estimate the minimum mass black hole (BH) needed to destroy a bar. Initially, bars form in the disks v
Externí odkaz:
http://arxiv.org/abs/astro-ph/9806002
Autor:
Hozumi, Shunsuke
A particle method for reproducing the phase space of collisionless stellar systems is described. The key idea originates in Liouville's theorem which states that the distribution function (DF) at time t can be derived from tracing necessary orbits ba
Externí odkaz:
http://arxiv.org/abs/astro-ph/9705151