Hydrodynamical simulation of giant molecular clouds (GMC) in a barred spiral galaxy
Giant molecular clouds are stellar nurseries of a galaxy. They are important objects for understanding star formation in a galaxy. We investigate the GMC formation and evolution in a barred spiral galaxy performing high resolution 3D hydrodynamical simulations of the barred galaxy M83.
3D structures of density and HII regions in a cloud-cloud collision
Collisions between molecular clouds could explain the formation of the most massive stars. The images show a of simulation with star formation and radiative feedback processes (blue: Density, red: HII density). The left image shows the clouds just after contact, and the right shortly after collision.
Spiral structure in a galactic disc driven by a small companion
Many disc galaxies in the universe display striking spiral structures. The simulation shown here illustrates how such structure can be driven by the interaction with a small mass companion. The system evolves from the top-right where the companion can be seen near to the host galaxy. A clear 2-armed structure can be seen in the gas, winding into the galactic centre.
Gas velocity in a galaxy disc
While gas generally travels in a circle around the galactic centre, kicks from interactions between gas clouds and energy from stars can cause small deviations in the gas speed and direction. These so called 'peculiar velocities' are shown in this image.