HaloFit.jl

HaloFit.jl is a highly-optimized Julia package offering a suite of utilities designed for analyzing dark matter halo properties within a periodic box.

Functions

• shrink_sphere_cm!
• spherical_overdensity_mass
• angular_momentum
• λbullock
• nfw_concentration
• inertia_tensor
• ellipsoid_axes_ratio
• ρcrit0
• cm_displacement
• virial_fraction

Throughout the code, the following unit convenvention is assumed:

• Length: $\mathrm{Mpc} / h$
• Mass: $\mathrm{M}_\odot / h$
• Velocity: $\mathrm{km} / \mathrm{s}$
• Gravitational potential: $(\mathrm{km} / \mathrm{s})^2$

Installation

To install HaloFit.jl, you can clone the repository directly:

git clone https://github.com/Richard-Sti/HaloFit.jl
cd HaloFit.jl

Start Julia and activate the project:

using Pkg
Pkg.activate(".")
Pkg.instantiate(".")
Pkg.precompile(".")

Dependencies

This project relies on the following Julia packages:

• LoopVectorization.jl
• Optim.jl

Basic Usage

Here's a quick start guide on using HaloFit.jl:

using HaloFit

# Matrices of halo's particle positions, velocities, and masses
pos = ...
vel = ...
mass = ...

boxsize = ...

h = Halo()

shrinking_sphere_cm!(h)
@show h.cm

For a working example, see ...

License

This project is licensed under the GNU General Public License v3.0 - see the LICENSE file for details.