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ExoZvezda

ExoZvezda is an open-source code for performing simulations of exotic compact objects, based on the publicly available 3+1 numerical relativity code GRChombo. It inherits all of the capabilities of the main code and 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.

Current exotic compact objects available for evolution:

  • Single and binary evolution of boson stars (BSs) 🔮

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

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

Citation

If you use ExoZvezda as part of a paper, please cite the following publications:

@article{Helfer:2021brt,
    author = "Helfer, Thomas and Sperhake, Ulrich and Croft, Robin and Radia, Miren and Ge, Bo-Xuan and Lim, Eugene A.",
    title = "{Malaise and remedy of binary boson-star initial data}",
    eprint = "2108.11995",
    archivePrefix = "arXiv",
    primaryClass = "gr-qc",
    doi = "10.1088/1361-6382/ac53b7",
    journal = "Class. Quant. Grav.",
    volume = "39",
    number = "7",
    pages = "074001",
    year = "2022"
}

@article{Evstafyeva:2022bpr,
    author = "Evstafyeva, Tamara and Sperhake, Ulrich and Helfer, Thomas and Croft, Robin and Radia, Miren and Ge, Bo-Xuan and Lim, Eugene A.",
    title = "{Unequal-mass boson-star binaries: initial data and merger dynamics}",
    eprint = "2212.08023",
    archivePrefix = "arXiv",
    primaryClass = "gr-qc",
    doi = "10.1088/1361-6382/acc2a8",
    journal = "Class. Quant. Grav.",
    volume = "40",
    number = "8",
    pages = "085009",
    year = "2023"
}

@article{Croft:2022gks,
    author = "Croft, Robin",
    title = "{Local continuity of angular momentum and noether charge for matter in general relativity}",
    eprint = "2203.13845",
    archivePrefix = "arXiv",
    primaryClass = "gr-qc",
    doi = "10.1088/1361-6382/accc6a",
    journal = "Class. Quant. Grav.",
    volume = "40",
    number = "10",
    pages = "105007",
    year = "2023"
}

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}
}