Speaker
J. Leo Kim
(Queen's University)
Description
We demonstrate a novel mechanism for forming dark compact objects and black holes through a dissipative dark sector. Heavy dark sector particles can be responsible for an early matter dominated era before Big Bang Nucleosynthesis (BBN). Density perturbations in this epoch can grow and collapse into tiny dissipative dark matter halos, which can cool via self-interactions. Once these halos have formed, a thermal phase transition can then shift the Universe back into radiation domination and standard cosmology. These halos can continue to collapse after BBN, resulting in the late-time formation of fragmented compact MACHOs and sub-solar mass primordial black holes.
Primary author
J. Leo Kim
(Queen's University)
Co-authors
Aaron Vincent
(Queen's University)
Christopher Cappiello
Joseph Bramante
(Queen's University & Perimeter Institute)
Melissa Diamond
Qinrui Liu
(Queen's University)
