Primordial black hole origin for thermal gamma-ray bursts

被引：2

作者：

del Barco, Oscar ^{[1
]}

机构：

[1] Univ Murcia, Inst Univ Invest Opt & Nanofis, Lab Opt, Campus Espinardo, E-30100 Murcia, Spain

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2021年 / 506卷 / 01期

关键词：

black hole physics; dark matter; black hole mergers; gamma-ray bursts; PHOTOSPHERIC EMISSION; GRAVITATIONAL-FIELD; POINT; MASS; RADIATION; SPECTRA;

D O I：

10.1093/mnras/stab1747

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A binary black hole (BH) astrophysical scenario where a mass-constrained (2.5 x 10(-13)M(circle dot)) primordial black hole (PBH) undergoes a radial fall on to its heavier component (such as a supermassive black hole, SMBH) is described as an intense gamma-ray emission event. As the relativistic PBH approaches the Schwarschild SMBH event horizon, its Lorentz-boosted Hawking radiation progressively reduces to a near-zero emission cone resulting in a highly collimated thermal beam. Accordingly, our numerically calculated PBH flux density S-nu and nu S-nu fluence spectrum show a decreasing Planck-like spectral dependence consistent with the cooling behaviour of thermal-dominant gamma-ray bursts (GRBs). Our results might provide an alternative explanation for thermal GRBs based on PBH origin.

引用

页码：806 / 812

页数：7

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