Definitions of the various parameters used can be found here. Links to individual parameters are also available below.
Number of bodies to be integrated:
-Note that larger numbers of bodies will take longer to simulate
Select the form of background potential to impose (look here for details):
No Background Potential
Power Law Potential
Time Dependent Bar Potential
Homogeneous Sphere Potential
The various forms of background potentials require variable inputs;
see potential descriptions
for specific use of each parameter for the selected potential:
-Note: The "Galaxy Potential" doesn't use these parameters
Select the method of integration for the background potential. These
methods are described here.
Self Gravity Leapfrog
In addition to (or instead of) a background potential, the simulator
can integrate using the self-gravity of the bodies (see here for details). Select the
desired self-gravity integration method:
No Self Gravity
Direct Force Summation
Choose the time duration of the simulation:
-Note: Large values are allowed, but be aware that simulation time (and mpeg download time) will grow accordingly.
Enter the simulation timestep; ie, the time
differential used to evolve particle trajectories:
Enter the image dumping
frequency; ie, the number of timesteps to elapse between movie frames:
Enter the radial density distribution dispersion variable alpha:
-Note: smaller values of alpha lead to a more defined ring
Select the dimensions in pixels of each MPEG frame:
704 x 576
352 x 288
176 x 144
-Note: Larger MPEGs will take longer to produce and download.