Magnetogenesis from early structure formation due to Yukawa forces

Understand

Yukawa interactions can mediate relatively long-range attractive forces between fermions in the early universe.

• Such a globally attractive interaction creates an instability that can result in the growth of structure in the affected species even during the radiation dominated era.
• The formation and collapse of fermionic microhalos can create hot fireballs at the sites of the collapsing halos which inject energy into the cosmic plasma.
• In this paper we study a new phenomena which can take place in such models.