These are the simplest tests: a suite of spherical one and two component galaxies. The files are available for download as Gadget format binary files. For information on reading/writing Gadget files, see file formats.
For all tests, the units are:
We set up three isotropic single component models described by a simple “Dehnen” split power-law sphere, using the method described in Read et al. 2006:
where is the total mass, is the central asymptotic logarithmic slope, and is the scale length. The parameters and data files are given in the following Table:
where is the number of particles that for these single component models are stored in the dark matter array.
A million sample points is, of course, optimistic, but these can be simply down-sampled to represent a more realistic observational situation. Similarly, line of sight velocities can be used, rather than the full phase space information.
We set up three spherical isotropic multi-component models similarly to the single component models, above. These are double-Dehnen spheres with stars describing a tracer population of negligible mass and dark matter (with a different distribution function) describing the mass distribution. The properties are as follows:
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