Isolated Discs

Isolated discs are galactic discs, initialized using some analytic potential or profile to match some chosen real or idealized galaxy system. Often they are in initial equilibrium, but may require a number of rotation periods to settle into dynamical equilibrium once time integration and/or gas cooling is turned on.

Construction Tools

MAGI (MAny-component Galaxy Initializer)

MAGI is an isolated disk IC generator from Japan. It’s described in Miki & Umemura 2018

Machine-Specific Build Instructions

Bigblue

In general, follow the instructions on the MAGI bitbucket. Some deviations are as follows:

• MAGI needs GSL, so load version 2.7.1: module load gsl/2.7.1
• Configure with cmake: cmake ../ -DUSE_TIPSY_FORMAT=ON -DUSE_SFMT=OFF

Usage

• BEWARE: velocity units will be wrong! It does not use the gasoline/ChaNGa $G=1$ time units unless the unit system in the .cfg is set to 3

GalactICS

GalactICS is an isolated disk IC generator that Alex Pettitt recommends.