Quantum mechanics

Theoretical physics

Primordial black hole

Inflation (cosmology)

Particle physics

Astrophysics

LIGO

Binary black hole

Spectrum (functional analysis)

Physics

Astronomy

Gravitational wave

Gravitational microlensing

Dark matter

Stars

Physical review. D/Physical review. D.

Primordial Black Hole (PBH) is one of the leading non-particle candidates for dark matter (DM). Although several observations severely constrain the amount of PBHs, it is recently pointed out that there is an uncertainty on the microlensing constraints below $\sim 10^{-10} M_\odot$ which was ignored originally but may weaken the constraints significantly. In this paper, facing this uncertainty, we investigate the possibility that PBHs can make up all DM in a broad mass spectrum. Moreover, we propose a concrete inflation model which can simultaneously produce PBHs for all DM in a broad mass spectrum around $\mathcal O(10^{-13}) M_\odot$ and PBHs for LIGO events in a sharp mass spectrum at $\mathcal O(10) M_\odot$.

Double inflation as a single origin of primordial black holes for all dark matter and LIGO observations