The CosmicProfiles project
CosmicProfiles provides shape and density profile analysis tools for cosmological simulations (and beyond). Its features include
overall halo shape determination, i.e. major, intermediate, minor axis vectors and shape quantities such as intermediate-to-major axis ratio or sphericity
halo shape profile determination
iterative shell-based shape profile determination algorithm for high-resolution halos
iterative ellipsoid-based shape profile determination algorithm for lower-resolution halos
user can choose between reduced shape tensor and non-reduced shape tensor
supports
‘direct’ datasets (i.e. index catalogue provided by user) and
FoF / SUBFIND halo catalogues
GADGET-style I, II and HDF5 snapshot files
all functionalities available for dark matter halos, gas particle halos and star particle halos
in addition, allows for velocity dispersion tensor eigenaxes determination
halo density profile estimation using direct binning and kernel-based approaches - user can choose between direct binning into spherical shells and - direct binning into ellipsoidal shells
density profile fitting assuming either NFW, Hernquist 1990, Einasto or \(\alpha \beta \gamma\)-profile model - concentration-mass relationship of halos easy to calculate
mock halo generator: ellipsoidal or spherical, compatible with the 4 density profile models
easy to interface with pynbody to work with halos identified in a cosmological simulation (see example scripts)
easy to interface with nbodykit to harness large-scale structure capabilities (see example scripts)
various profile plotting and 3D point cloud plotting tools
efficient caching capabilities to accelerate look-ups