CosmicProfiles is a Cython package for Point Cloud Profiling
This repository 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
The documentation for CosmicProfiles is hosted on Read the Docs.
The easiest way to get CosmicProfiles is to install it with conda using the conda-forge channel:
conda install cosmic_profiles --channel conda-forge
Alternatively, you can use pip:
pip install cosmic-profiles
See the installation instructions in the documentation for more information.
Copyright 2020-2023 Tibor Dome.
CosmicProfiles is free software made available under the MIT License.
Contributions are welcome. Please raise an issue or open a PR.