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GR: Fachverband Gravitation, Relativistische Astrophysik und Kosmologie
GR 6: Black Holes I
GR 6.4: Vortrag
Dienstag, 17. März 2026, 17:00–17:15, KH 02.012
Formation and Time Evolution of Primordial Black Holes — Hans-Otto Carmesin1,2,3 and •Lina Jarck3 — 1Universität Bremen, Fachbereich 1, Postfach 330440, 28334 Bremen — 2Studienseminar Stade, Bahnhofstr. 5, 21682 Stade — 3Gymnasium Athenaeum, Harsefelder Straße 40, 21680 Stade
In the very early universe, the density has been sufficiently large, so that black holes have formed. Simultaneously, these can decay as a result of Hawking radiation.
(1) For various densities, the amount of primordial black holes is derived as a dynamical equilibrium value.
(2) A population-based simulation is developed in Python. The simulation models processes in the early universe: Photons move randomly within a defined space. When two photons meet, they can fall into the Schwarzschild radius and form a black hole. Its lifetime is determined. The black hole then decays back into two photons through Hawking radiation.
(3) The results are compared with primordial black holes observed by the James Webb Space Telescope.
Carmesin, H.-O. (2020): The Universe Developing from Zero-Point Energy - Discovered by Making Photos, Experiments and Calculations. Berlin: Verlag Dr. Köster.
Keywords: Relativity; Early Universe; Cosmology; Gravitational Instabilities; Black Holes