http://arxiv.org/abs/1908.00078
The primordial black hole (PBH) comprising full dark matter (DM) abundance is currently allowed if its mass lies between $10^{-16}M_{\odot} \lesssim M \lesssim 10^{-11} M_{\odot}$. This range is hard to be probed by gravitational lensing methods. In this paper, we revive an old discussion and advocate that the lensing parallaxes of Gamma-ray bursts (GRB) and Milky-Way (MW) stars, observed simultaneously by spatially separated detectors, can probe not only the unconstrained mass range but also the full possible range of PBH DM with lensing. The astrophysical scale accessible to us — $r_\oplus \sim$ AU — is large enough to resolve the lensing by unconstrained light PBH DM.
S. Jung and T. Kim
Fri, 2 Aug 19
40/61
Comments: 8 pages, 4 figures