Speaker
Oindrila Ghosh
(Stockholm University & the Oskar Klein Centre)
Description
Galaxy clusters host tangled magnetic fields, shaped by primordial seeds and amplified through cosmic dynamo action. While these fields stabilize over time, merger-driven shock waves can trigger magnetic amplification, sustained over the shock lifetime. Diffuse non-thermal emission and polarization measurements from radio relics indicate a magnetisation of the intracluster medium due to merger shocks in addition to particle acceleration at the shock site. I show the growth and saturation of such magnetic fields and demonstrate how they contribute to novel astrophysical search strategy of light dark matter species and gravitational waves.
Author
Oindrila Ghosh
(Stockholm University & the Oskar Klein Centre)
