The effect of Primordial Black Holes and streaming motions on structure formation

Understand

Primordial Black Holes could be an important component of the dark matter in the Universe.

• If they exist, they would add a Poisson component to the matter power spectrum.
• The extra power would speed up the emergence of dark matter halos that seed the formation of first stars and galaxies.
• Kashlinsky (2021) suggested that the additional velocity fluctuations would accelerate the infall of baryons onto the dark matter potential wells.