Supermassive Primordial Black Holes From Inflation

Understand

There is controversy surrounding the origin and evolution of our universe's largest supermassive black holes (SMBHs).

• In this study, we consider the possibility that some of these black holes formed from the direct collapse of primordial density perturbations.
• Since the mass of a primordial black hole is limited by the size of the cosmological horizon at the time of collapse, these SMBHs must form rather late, and are naively in conflict with constraints from CMB spectral distortions.
• These limits can be avoided, however, if the distribution of primordial curvature perturbations is highly non-Gaussian.