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GRB lensing parallax: Closing primordial black hole dark matter mass window
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abstract
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 lightest mass range is hard to be probed by ongoing gravitational lensing observations. In this paper, we advocate that an old idea of the lensing parallax of Gamma-ray bursts (GRBs), observed simultaneously by spatially separated detectors, can probe the unconstrained mass range; and that of nearby stars can probe a heavier mass range. In addition to various good properties of GRBs, astrophysical separations achievable around us --- $r_\oplus \text{--}$ AU --- is just large enough to resolve the GRB lensing by lightest PBH DM.
Forward citations
Cited by 2 Pith papers
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What triggers type Ia supernovae: Prompt detonations from primordial black holes or companion stars?
Collision rate simulations between asteroid-mass primordial black holes and white dwarfs reproduce the observed rate, host, and brightness distributions of type Ia supernovae, and the author argues these dark matter i...
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Constraining primordial black holes and primordial curvature power spectrum with extragalactic muon neutrino
Neutrino flux from WIMP annihilation in PBH-seeded UCMHs yields f_PBH ≲ 4×10^{-5} (strongest) and P_R ≲ 10^{-1.65} at k∼3×10^{12} Mpc^{-1}.
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