Heidelberg 2022 – wissenschaftliches Programm
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GR: Fachverband Gravitation und Relativitätstheorie
GR 13: Numerical Relativity
GR 13.4: Vortrag
Donnerstag, 24. März 2022, 15:00–15:20, GR-H2
Critical Collapse with bamps. — Daniela Cors Agulló1, •Sarah Renkhoff1, Isabel Suárez Fernández2, Hannes Rütter3, David Hilditch2, and Bernd Brügmann1 — 1Theoretisch-Physikalisch Institut, Friedrich-Schiller-Universität, Jena, Germany — 2CENTRA, Instituto Superior Tecnico, Lisbon, Portugal — 3Max-Planck-Institut für Gravitationphysik, Potsdam, Germany
Our pseudo-spectral code bamps, with its new adaptive mesh refinement, allows us to tune closer to the critical point between gravitational collapse and dispersed fields. We study, on the one hand critical phenomena in spherical symmetry by evolving scalar fields using generalised harmonic gauge and compare among several gauge source functions. On the other hand, we can assess critical phenomena in an axisymmetric setting by evolving gravitational waves in vacuum. We evolve six one-parameter families of Brill wave initial data: three prolate and three oblate, including two centred and four off-centred. Time permitting, we will discuss the relevance of our results in the context of critical collapse beyond spherical symmetry.