Some gravitational aspects of scalar field dark matter

par Patrick VALAGEAS (CEA Saclay)

jeudi 29 janv. 2026, 14:00 → 16:00 Europe/Paris

Scalar field dark matter models (such as Fuzzy Dark Matter, axion-like particles, ultra-light DM) are interesting dark matter candidates.
Their gravitational dynamics follow the usual CDM behaviors on large scales but differ on small scales because of wave effects or self-interactions.
Focusing on scalar-field dark matter with non-negligible self-interactions, I will present a few aspects of their gravitational dynamics: the formation of solitons, which may play a role for the tensions of CDM on galactic scales, accretion onto Black Holes, which could provide a probe of such DM clouds
through gravitational waves, and the formation of vortex lattices.