Comment on "Quantum-Mechanical Suppression of Gas Accretion by Primordial Black Holes"

Abstract

It was recently claimed (arXiv:2409.09081v1 [astro-ph.HE]) that accretion of ordinary matter on black holes of mass $(6\times 10^{14}-4\times 10^{19})$g would be inhibited by quantum mechanical effects, namely the de Broglie wavelength of the electron being larger than the Schwarzschild radius. However the conclusion is based on considering accretion of a single atom over the age of the Universe. There is no suppression of the accretion rate per atom on such black holes.

Comments: 1 page. Comment on arXiv:2409.09081