Limits on Primordial Black Holes from M87

Abstract

Primordial black holes in the solar mass range are a possibly significant component of dark matter. We show how an argument relating the deflection of light by such black holes in the density spike likely to exist around the M87 supermassive black hole, combined with the high resolution observations of the EHT collaboration, can lead to a strong limits on the primordial black hole mass fraction in an astrophysically relevant mass range. The results depend on the model assumed for the dark matter spike and suggest the interest of further understanding of such spikes as well as further high resolution observations on supermassive black holes.

nine pages, one figure, one table

References in corpus (5)

• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
• Constraints on Earth-mass primordial black holes from OGLE 5-year microlensing events
• Dark matter spikes in the vicinity of Kerr black holes
• Primordial Black Holes as Dark Matter: Constraints From Compact Ultra-Faint Dwarfs
• Constraining primordial black holes in dark matter with kinematics of dwarf galaxies

Cited by in corpus (1)

• Dark matter effect on the weak deflection angle by black holes at the center of Milky Way and M87 galaxies