tigress_ncr_cooling is a stand-alone C++ program for calculating equilibrium photochemistry of the interstellar medium based on Kim, Gong, Kim, & Ostriker (2023). The source code builds upon the photochemistry module implemented in the Athena-TIGRESS code (written C; to be rewritten in C++) and infrastructure in Athena++.

To compile the code and run simulations:

./configure.py
make clean
make
cd inputs
python run_simulations.py

You may need to manually adjust input parameters (e.g., FUV, CR rate, metallicity, dust abundance) in run_simulations.py. Also pass --help to python scripts to see other options.

See notebook for results of some example calculations.