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Publication > Research Gallery > Computational Astrophysics

Research Gallery

Computational Astrophysics (formerly CFD-MHD)

Cotribution analysis of molecular line of a disk Cotribution analysis of molecular line of a disk
the plot visualizes the contribution of the specific transition of the molecule from a certain observing angle ...(more)
Formation of Isothermal Circumplanetary Disks with Three-Dimensional Global Simulations for Sub-Neptune-Mass Protoplanets Formation of Isothermal Circumplanetary Disks with Three-Dimensional Global Simulations for Sub-Neptune-Mass Protoplanets
In the bottom panels, square sections of surface density simulated with Antares are shown centered at the locations of protoplanets. The surface density is obtained by vertical integration over z ...(more)
A Self-consistent Model for Super/sub-luminal Motions and Particle Acceleration in the M87 Jet A Self-consistent Model for Super/sub-luminal Motions and Particle Acceleration in the M87 Jet
Distribution of the physical quantities along the jet propagation axis. We perform special relativistic MHD simulations in a cylindrical 1.5-dimensional pproximation. Our model reproduces a paired super/subluminal knot motions, taken ...(more)
HYDRODYNAMICAL SIMULATIONS OF THE BARRED SPIRAL GALAXY NGC 1097 HYDRODYNAMICAL SIMULATIONS OF THE BARRED SPIRAL GALAXY NGC 1097
A comparison between the numerical simulation result and the observation of NGC 1097. Left panel: The projected surface density distribution of the simulation result. Middle panel: Optical image of NGC ...(more)
Micro-ejections in star-disk resistive magnetohydrodynamic simulations Micro-ejections in star-disk resistive magnetohydrodynamic simulations
In simulations of a star-disk system in the closest vicinity of a star, we obtain very fast, light ejecta of matter. Those micro-ejections are of small mass and angular momentum ...(more)
On the Orbital Evolution of a Jovian Planet Embedded in a Self-Gravitating Disk On the Orbital Evolution of a Jovian Planet Embedded in a Self-Gravitating Disk
Our simulations indicate that in the study of the runaway (type III) migration, it is important to carry out a fully self consistent treatment of the gravitational interaction between the ...(more)
Self-gravitational force calculation of infinitely thin gaseous disks Self-gravitational force calculation of infinitely thin gaseous disks
The numerical solutions of a D2 disk for N=1024, the profiles are surface density (left-top), the x-directional force (right-top), the y-directional force(left-bottom), and radial force(right-bottom). ...(more)
The Effect of Bars and Transient Spirals on the Vertical Heating in Disk Galaxies The Effect of Bars and Transient Spirals on the Vertical Heating in Disk Galaxies
The left panel corresponds to the particle image showing the face on and two edge on views of an initially axisymmetric disk. The right panel shows the formation of a ...(more)
Hydrodynamical Simulations of the Barred Spiral Galaxy NGC 6782 Hydrodynamical Simulations of the Barred Spiral Galaxy NGC 6782
Numerical calculations reveal that the striking features in NGC 6782 can be reproduced provided that the gas flow is governed by the gravitational potential associated with a slowly rotating strong ...(more)
Probing Substellar Companions of Asymptotic Giant Branch Stars through Spirals and Arcs Probing Substellar Companions of Asymptotic Giant Branch Stars through Spirals and Arcs
Three dimensional hydrodynamical simulations show that the substellar mass objects produce detectable signatures, corresponding to density contrasts of 10--200 % and arm separations of 10--400 AU at 100 AU distance, ...(more)
Gravitationally Induced Density Wake of a Circularly Orbiting Object As an Interpretative Framework of Ubiquitous Spirals and Arcs Gravitationally Induced Density Wake of a Circularly Orbiting Object As an Interpretative Framework of Ubiquitous Spirals and Arcs
The above figures show the density enhancement of the spiral-onion shell shape (a) in the equatorial plane, (b) in a meridional plane, and (c) as a function of the distance ...(more)
Impact of Type Ia Supernova Ejecta on a Helium Star Binary Companion Impact of Type Ia Supernova Ejecta on a Helium Star Binary Companion
Observations of SNIa rates as a function of redshift suggest the existence of a short delay time population of 100 Myr and a long delay time population of 3-4 Gyr. ...(more)
Collimated fast winds in Preplanetary Nebulae Collimated fast winds in Preplanetary Nebulae
Simulations of our CFW models from 1 to 6, at the age of ~160 yr. Parts (a), (c), (e), (g), (i), and (k) show the number density of hydrogen nuclei ...(more)
Magnetospheric Accretion and Ejection of Matter in Resistive MHD Simulations Magnetospheric Accretion and Ejection of Matter in Resistive MHD Simulations
In numerical simulations of the star-disk system, after the relaxation, the disk is truncated at the truncation radius R_t. Position of the R_t is close to the line of balance ...(more)
Simulations of winds Simulations of winds
Simulations of winds of terminal speed of 300 km/s (~3Va) and ambient densities 10E-20 g/cm^3. The results are plotted on four-panels to illustrate selected time frames of 100, 400, 700, ...(more)
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