Fast Radio Bursts---A Brief Review: Some Questions, Fewer Answers
Fast Radio Bursts---A Brief Review: Some Questions, Fewer Answers
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DOI：
10.1142/s0217732316300135
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发表时间：
2016-04
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影响因子：
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通讯作者：
Jonathan I. Katz
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文献类型：
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作者：
Jonathan I. Katz
快速射电爆发是最近在脉冲星调查中发现的频率约为1 GHz的毫秒级射电辐射爆发。它们还没有被确定为任何其他天文物体或现象。爆发是强烈分散的，表明穿过了高柱密度的低密度等离子体。最经济的解释是，这是间冰期介质，表明FRB处于红移在0.3-1.3范围内的“宇宙”距离。据推测，它们的亮温高达10美元，这意味着像射电脉冲星一样，是由“聚束”电荷发出的相干辐射。我回顾了被认为是FRB起源的天文地点、天体和发射过程，特别关注软伽马中继器和巨型脉冲星脉冲。
Fast Radio Bursts are millisecond bursts of radio radiation at frequencies of about 1 GHz, recently discovered in pulsar surveys. They have not yet been definitively identified with any other astronomical object or phenomenon. The bursts are strongly dispersed, indicating passage through a high column density of low density plasma. The most economical interpretation is that this is the interglactic medium, indicating that FRB are at "cosmological" distances with redshifts in the range 0.3--1.3. Their inferred brightness temperatures are as high as $10^{37\,\circ}$K, implying coherent emission by "bunched" charges, as in radio pulsars. I review the astronomical sites, objects and emission processes that have been proposed as the origin of FRB, with particular attention to Soft Gamma Repeaters and giant pulsar pulses.