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NRPyCritCol & SFcollapse1D: an open-source, user-friendly toolkit to study critical phenomena

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arxiv 2106.06553 v2 pith:GVGIRIXJ submitted 2021-06-11 gr-qc

classification gr-qc
keywords criticalphenomenacollapsefieldsmasslessscalarsfcollapse1dtoolkit
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We present a new open-source, user-friendly toolkit of two codes$-$SFcollapse1D and NRPyCritCol$-$to study critical phenomena in the context of gravitational collapse. SFcollapse1D is a C/C++ tool designed to solve the problem of gravitational collapse of massless, spherically symmetric scalar fields with the ADM formalism in spherical-like coordinates. NRPyCritColis a collection of Python modules that leverage the NRPy+ infrastructure to generate a highly optimized C-code for evolving massless scalar fields within a covariant BSSN formalism. The toolkit was developed with user-friendliness and code efficiency in mind, enabling the exploration of critical phenomena with consumer-grade computers. We present a study of critical phenomena from the collapse of massless scalar fields in spherical symmetry, using only these two codes and a laptop computer.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Universality in quasinormal modes of a magnetized black hole

    gr-qc 2025-12 unverdicted novelty 6.0 of 10

    For charged scalar perturbations of an Ernst-Schwarzschild black hole, the quasinormal-mode frequency scales as |q - q_c|^{1/2} near a critical charge q_c, with a mode-independent exponent.

  2. Critical Phenomena in Gravitational Collapse

    gr-qc 2025-07 unverdicted novelty 3.0 of 10

    An authoritative review of critical collapse, updated with results on nonspherical vacuum collapse and rigorous PDE blowup.

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