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GR: Fachverband Gravitation und Relativitätstheorie

GR 6: Cosmology

GR 6.1: Talk

Tuesday, March 22, 2022, 16:15–16:35, GR-H3

Psi in the sky - the cosmology window on wavelike dark matter — Cora Uhlemann and •Alex Gough — Newcastle University, Newcastle-upon-Tyne, UK

Despite the astonishing success of cosmological probes in constraining the LCDM model, the dark matter mass remains one of the least constrained physical parameters. Wavelike dark matter is an intriguing alternative to standard cold dark matter with key particle physics motivations (like the QCD axion or ultralight axion-like particles) and distinct astrophysical signatures. With a simple dynamical model for the evolution of the dark matter wavefunction (Psi), I will demonstrate how to predict the formation of topological defects and granules arising from destructive and constructive wave interference. Together with the wave interference imprint on substructures that leads to exciting and varied probing mechanisms bridging cosmology, astrophysics and particle physics.