Cosmic microwave background bounds on primordial black holes including dark matter halo accretion

This paper presents updated cosmic microwave anisotropy bounds on the abundance of primordial black holes, accounting for the extra gravitational pull on gas due to the accretion of dark matter halos. The authors show that these constraints dominate over others available in the literature for black hole masses $20{-}50{{0.167em}{0ex}}{M}_{{}}{}M{}2×{}{10}⁴{{0.167em}{0ex}}{M}_{{}}$.