GRFolres

GRFolres is an open-source code for performing simulations in modified theories of gravity, based on the publicly available 3+1D numerical relativity code GRChombo. It is developed and maintained by a collaboration of numerical relativists with a wide range of research interests, from early universe cosmology to astrophysics and mathematical general relativity.

GRFolres is written entirely in C++14, using hybrid MPI/OpenMP parallelism to achieve good performance on the latest architectures. It inherits all of the capabilities of the main GRChombo code, which makes use of the Chombo library for adaptive mesh refinement.

Getting started

Detailed installation instructions and usage examples are available in our wiki, with the home page giving guidance on where to start.

Contributing

We welcome feedback, bug reports, and contributions. Please consult the wiki for our coding style and testing policy before filing a pull request.

License

GRFolres is licensed under the BSD 3-Clause License. Please see LICENSE for details.

Citation

If you use GRFolres as part of a paper, please cite our JOSS publication which you can do using the following BibTeX entry:

@article{AresteSalo:2023hcp, author = "Arest\'e Sal\'o, Llibert and Brady, Sam E. and Clough, Katy and Doneva, Daniela and Evstafyeva, Tamara and Figueras, Pau and Fran\c{c}a, Tiago and Rossi, Lorenzo and Yao, Shunhui", title = "{GRFolres: A code for modified gravity simulations in strong gravity}", eprint = "2309.06225", archivePrefix = "arXiv", primaryClass = "gr-qc", month = "9", doi = "10.21105/joss.06369", journal = "J. Open Source Softw.", volume = "9", number = "98", pages = "6369", year = "2024" } as well as the GRChombo JOSS publication, which has the following BibTeX reference: @article{Andrade2021, doi = {10.21105/joss.03703}, url = {https://doi.org/10.21105/joss.03703}, year = {2021}, publisher = {The Open Journal}, volume = {6}, number = {68}, pages = {3703}, author = {Tomas Andrade and Llibert Areste Salo and Josu C. Aurrekoetxea and Jamie Bamber and Katy Clough and Robin Croft and Eloy de Jong and Amelia Drew and Alejandro Duran and Pedro G. Ferreira and Pau Figueras and Hal Finkel and Tiago Fran\c{c}a and Bo-Xuan Ge and Chenxia Gu and Thomas Helfer and Juha Jäykkä and Cristian Joana and Markus Kunesch and Kacper Kornet and Eugene A. Lim and Francesco Muia and Zainab Nazari and Miren Radia and Justin Ripley and Paul Shellard and Ulrich Sperhake and Dina Traykova and Saran Tunyasuvunakool and Zipeng Wang and James Y. Widdicombe and Kaze Wong}, title = {GRChombo: An adaptable numerical relativity code for fundamental physics}, journal = {Journal of Open Source Software} }