Fast radio bursts from primordial black hole binaries coalescence

Abstract

In this paper we propose the model that the coalescence of primordial black holes (PBHs) binaries with equal mass M ∼ 10 28 g can emit luminous gigahertz (GHz) radio transient, which may be candidate sources for the observed fast radio bursts (FRBs), if at least one black hole holds appropriate amount of net electric charge Q. Using a dimensionless quantity for the charge q = Q/ √ GM , our analyses infer that q ∼ O(10 −4.5 ) can explain the FRBs with released energy of order O(10 40 )ergs. With the current sample of FRBs and assuming a distribution of charge φ(q) for all PBHs, we can deduce that its form is proportional to q −3.0±0.1 for q ≥ 7.2 × 10 −5 if PBHs are sources of the observed FRBs. Furthermore, with the proposed hypothetical scenario and by estimating the local event rate of FRBs ∼ 2.6 × 10 3 Gpc −3 yr −1 , one derives a lower bound for the fraction of PBHs (at the mass of 10 28 g) against that of matter fPBH(10 28 g) 10 −5 needed to explain the rate. With this inspiring estimate, we expect that future observations of FRBs can help to falsify their physical origins from the PBH binaries coalescences. In the future, the gravitational waves produced by mergers of small black holes can be detected by high frequency gravitational wave detectors. We believe that this work would be a useful addition to the current literature on multimessenger astronomy and cosmology.

Primordial black holes from modified supergravity

“…Numerous phenomenological scenarios were proposed for PBH formation and, especially, for PBH generation after inflation in the early Universe, under the assumption that PBHs contribute to DM (see e.g., Refs. [14][15][16][17][18][19][20] and the references therein). Indeed, the whole PBH DM case leaves only two limited windows for allowed PBH masses around either 10 −15 or 10 −12 of the Solar mass.…”

Magnetars from Neutron Star–White Dwarf Mergers: Application to Fast Radio Bursts

“…Up to date, over 100 FRBs have been reported in the literature and collected in FRB Catalogue 1 . Meanwhile, to explain this radio phenomena, dozens of progenitor models involved in compact objects have been proposed (Kashiyama et al 2013;Falcke & Rezzolla 2014;Lyubarsky 2014;Geng & Huang 2015;Dai et al 2016;Gu et al 2016;Wang et al 2016;Zhang 2014Zhang , 2016Zhang , 2017Lyutikov et al 2016;Metzger et al 2017;Beloborodov 2017;Deng et al 2018;Margalit & Metzger 2018;Metzger et al 2019;Beloborodov 2019), accounting for non-repeating and/or repeating FRBs. A full model list can refer to Platts et al (2019)…”

Charged Compact Binary Coalescence Signal and Electromagnetic Counterpart of Plunging Black Hole–Neutron Star Mergers

“…When estimating the luminosity of the cCBC signal, Zhang (2016) considered the magnetic dipole radiation power by analogy with pulsars. Deng et al (2018) noticed that for a cCBC system, electric dipole radiation is actually more significant. We treat the electric dipole radiation following Deng et al (2018) in this subsection.…”

“…He further suggested that with a smaller charge, BH-BH merger systems may account for a fraction of non-repeating fast radio bursts (FRBs), the mysterious millisecond radio bursts at cosmological distances (Lorimer et al 2007;Thornton et al 2013). The charged BH-BH mergers were invoked in several other studies to account for the EM counterparts of BH-BH mergers or FRBs (Liebling & Palenzuela 2016;Liu et al 2016;Deng et al 2018;Fraschetti 2018;Levin et al 2018). Whether BHs can sustain a significant amount of charge is still an open question.…”