Erratum: Primordial black hole origin for thermal gamma-ray bursts

Abstract

A binary black hole (BH) astrophysical scenario where a mass-constrained (10 −17 − 10 −11 M ) primordial black hole (PBH) undergoes a spiral fall onto its heavier component (such as a supermassive black hole (SMBH)) is described as an intense gamma-ray emission event. As the infalling BH approaches the Schwarschild surface of its companion, the PBH evaporation rate becomes more strongly enhanced due to the PBH blueshifted emission towards the SMBH, until a complete evaporation occurs before reaching the central BH horizon. Accordingly, our numerically calculated PBH flux density Fν and νFν fluence spectrum show an increasing Planck-like spectral dependence consistent with the first instants of thermal-dominant gamma-ray bursts (GRBs), providing a plausible confirmation of such low-mass primordial ultracompact objects.