Expanding fireball in magnetar bursts and fast radio bursts

被引：13

作者：

Wada, Tomoki ^{[1
]}

Ioka, Kunihito ^{[2
]}

机构：

[1] Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778582, Japan

[2] Kyoto Univ, Yukawa Inst Theoret Phys, Ctr Gravitat Phys & Quantum Informat, Kyoto 6068502, Japan

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2023年 / 519卷 / 03期

关键词：

methods: analytical; stars: flare; stars: magnetars; stars: magnetic field; X-rays: bursts; SOFT GAMMA-REPEATERS; RAY BURST; X-RAY; NEUTRON-STARS; REIONIZATION HISTORY; RADIATIVE MECHANISM; THOMSON SCATTERING; EMISSION; ACCELERATION; CONSTRAINTS;

D O I：

10.1093/mnras/stac3681

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A fireball of radiation plasma created near the surface of a neutron star (NS) expands under its own pressure along magnetic field lines, and produces photon emission and relativistic matter outflow. We comprehensively classify the expanding fireball evolution into five cases, and obtain the photospheric luminosity and the kinetic energy of the outflow, taking into account key processes; lateral diffusion of photons escaping from a magnetic flux tube, effects of strong magnetic field, baryon loading from the NS surface, and radiative acceleration via cyclotron resonant scattering, some of which have not been considered in the context of gamma-ray bursts. Applying our model to magnetar bursts with fast radio bursts (FRBs), in particular the X-ray short bursts from SGR 1935+2154 associated with the Galactic FRB 20200428A, we show that the burst radiation can accelerate the outflow to high-Lorentz factor with sufficient energy to power FRBs.

引用

页码：4094 / 4109

页数：16

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