Speaker
Anslyn John
(Stellenbosch University)
Description
Tensions between cosmological simulations and astronomical observations may be resolved by extensions to the ΛCDM paradigm. We consider the possibility that dark matter may self-interact and possess viscosity. Including dissipative effects in cosmic fluids will modify their clustering properties which could have observable effects on the formation of large-scale structure. We analyse the evolution of density perturbations during the radiation and matter eras and examine the impact of shear viscosity on the Meszaros effect.
Author
Anslyn John
(Stellenbosch University)
