Year: 2022
Type: article
Abstract: As a first application of the new adaptive mesh functionality of the pseudospectral numerical relativity code bamps, we evolve twist-free, axisymmetric gravitational waves close to the threshold of collapse. We consider six different one-parameter families of Brill wave initial data; two centered and four off-centered families. Of these the latter have not been treated before. Within each family, we tune the parameter towards the threshold of black hole formation. The results for centered data agree with earlier work. Our key results are first, that close to the threshold of collapse the global peak in the curvature appears on the symmetry axis but away from the origin, indicating that in the limit they will collapse around disjoint centers. This is confirmed in three of the six families by explicitly finding apparent horizons around these large curvature peaks. Second, we find evidence neither for strict discrete-self-similarity nor for universal power-law scaling of curvature quantities. Finally, as in Ledvinka and Khirnov's recent study, we find approximately universal strong curvature features. These features appear multiple times within individual spacetimes close to the threshold and are furthermore present within all six families.
Authors: Isabel Suárez Fernández, Sarah Renkhoff, Daniela Cors Agulló, Bernd Brügmann, David Hilditch
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G1844750848, Metodologias avançadas de extração de ondas na relatividade numérica e na astronomia de ondas gravitacionais., G3836280807, GRK 2522: Starke Dynamik und Kritikalität in Quanten und Gravitationssystemen, Centro de Astrofísica e Gravitação, Critical Phenomena in gravitational collapse, Critical Phenomena in gravitational collapse
OpenAlex ID: W4286002116