Collisions with an Isothermal Sphere


click on the above image to see a movie of the simulation
Note : you are looking down at the gas of the galaxy as it collides with the Isothermal Sphere. The simulation shows the formation of a ring structure after it collides with the perturber.



We consider the collision of a disk galaxy with a Truncated Isothermal Sphere.

• the density profile of the isothermal sphere is given by:

• the impact parameter, b = 5 kpc

• initial distance from the center of the perturber = 100 kpc

• velocity of disk galaxy towrds the perturber = 200 km/s

• mass of the prturber is approximately 1/5 the mass of the disk

• The Truncation Radius of the perturber is 10 kpc