PION: simulations of nebulae around stars

PION is a grid-based fluid dynamics code for hydrodynamics and magnetohydrodynamics, including a ray-tracing module for calculating the attenuation of radiation from point sources of ionizing photons. It also has a module for coupling fluid dynamics and the radiation field to microphysical processes such as heating/cooling and ionization/recombination. The algorithms are described in Mackey et al. (2021), Mackey (2012), Mackey & Lim (2011), and Mackey & Lim (2010).

PION was written to model the evolution of HII regions, photoionized bubbles that form around hot stars, and developed to include stellar wind sources so that both wind bubbles and photoionized bubbles can be simulated at the same time. It is versatile enough to be extended to other applications.

The current version of PION is 2.0.0, available at the release page.

There are two versions of PION, the released version and development version. Only the released version is freely available. If you want to work with the development version you need to request access.

• Documentation for the released version, 2.0.0: https://pion.ie/docs/.

• Documentation for the development version: https://pion.ie/docs/dev/.

This documentation is for the released version.

Guide

• 1. Getting Started
  • 1.1. Introduction to PION
  • 1.2. Getting the PION source code
  • 1.3. Getting help
  • 1.4. System Requirements for compiling and running PION
    • 1.4.1. Debian 9
    • 1.4.2. Debian 10
    • 1.4.3. Ubuntu 18
    • 1.4.4. OS X
    • 1.4.5. Windows10
  • 1.5. Compiling PION
  • 1.6. Trouble Compiling?
• 2. Running an example simulation
  • 2.1. Preparation
  • 2.2. 2D simulation of a bow shock around a moving star
  • 2.3. Looking at the results
• 3. Another Example: colliding winds (2D)
  • 3.1. Introduction
  • 3.2. Running the simulation
• 4. Using Python to plot simulation
  • 4.1. Installing PyPion
    • 4.1.1. Using the PyPion docker image
    • 4.1.2. Using the system python installation
  • 4.2. Using PyPion to look at simulation data
  • 4.3. Known issues with Python
• 5. Description of the parameters in PION parameter files
  • 5.1. Stellar Winds
• 6. Reference Guide for PION modules
  • 6.1. Microphysics modules for PION
    • 6.1.1. Production Modules
    • 6.1.2. Legacy Modules
  • 6.2. Boundary Conditions
    • 6.2.1. General-purpose boundary conditions
    • 6.2.2. Special-purpose boundaries
• 7. PION license
• 8. PION README
  • 8.1. Information
  • 8.2. Developers
  • 8.3. Licence

Indices and tables

• Index

• Module Index

• Search Page