Generating initial conditions

pNbody provides several methods and script to generate initial conditions for N-body evolution codes. No method exists yet to generate cosmological initial conditions.

The generation of initial conditions is devided into two parts. First, the generation of a mass profile by distributing particles in space. Secondly, the determination of the velocities for each of these particles.

A series of script is also provided to ease the generation of initial conditions. The first set of scripts distribute particles in the phase-space, properly sampling a distribution function. The second set solve the Jeans equations in spherical and cylindrical coordinates to assemble a multi-component galaxy.

• Generating mass profiles
  • Examples:
  • Generic spherical distributions:
  • Generic cubic distributions:
• Generating velocities
  • Spherical coordinate
  • Example : Set a Plummer sphere to the jeans equilibrium
  • Cylindrical coordinate
  • Example : Set an exponnential disk to the jeans equilibrium
• Generating initial conditions from a distribution function
  • Scripts
• Generating a multi-components galaxy
  • Plotting the corresponding rotation curve
  • More examples
  • ic_makeGalaxy