论文标题
通过在星云中重复快速无线电爆发来加热同步加速器加热的无线电发射
Persistent Radio Emission from Synchrotron Heating by a Repeating Fast Radio Burst Source in a Nebula
论文作者
论文摘要
发现第一个重复快速无线电爆发（FRB），FRB 121102，与空间重合的，持续的非热无线电源有关，但持续发射的起源仍然未知。在本文中，我们提出，持续的发射是通过同步加热过程通过自吸收的同步子星云中的多个FRB 121102产生的。由于同步子星云吸收的重复FRB的爆发群，星云中电子的能量分布将发生显着变化。结果，星云的光谱将稳步显示出驼峰。对于FRB 121102的持续排放，注入星云的爆发的总能量必须为$ 3.3 \ times10^{49} {49} \，\ unit {erg {erg} $，爆发年龄超过$ 6.7 \ times times 10^4 \ times 10^4 \，\，\，\ yr {yr} $ $ \ sim0.02 \，\ unit {pc} $，电子号码约为$ 3.2 \ times10^{55} $。我们预测，随着爆发的注射，星云的亮度将比当前的观察更明亮，与此同时，峰频率将变得更高。由于星云的同步加速器吸收，将吸收一些低频突发，这可以解释为什么在$ \ sim1〜 \ unit {ghz} $上检测到大多数爆发。
The first repeating fast radio burst (FRB), FRB 121102, was found to be associated with a spatially coincident, persistent nonthermal radio source, but the origin of the persistent emission remains unknown. In this paper, we propose that the persistent emission is produced via synchrotron-heating process by multiple bursts of FRB 121102 in a self-absorbed synchrotron nebula. As a population of bursts of the repeating FRB absorbed by the synchrotron nebula, the energy distribution of electrons in the nebula will change significantly. As a result, the spectrum of the nebula will show a hump steadily. For the persistent emission of FRB 121102, the total energy of bursts injecting into the nebula is required to be about $3.3\times10^{49}\,\unit{erg}$, the burst injection age is over $6.7\times 10^4\,\unit{yr}$, the nebula size is $\sim0.02\,\unit{pc}$, and the electron number is about $3.2\times10^{55}$. We predict that as more bursts inject, the brightness of the nebula would be brighter than the current observation, and meanwhile, the peak frequency would become higher. Due to the synchrotron absorption of the nebula, some low-frequency bursts would be absorbed, which may explain why most bursts were detected above $\sim1~\unit{GHz}$.
