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The dispersion-brightness relation for fast radio bursts from a wide-field survey

机译：广域测量中快速无线电脉冲的色散-亮度关系

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摘要

Despite considerable efforts over the past decade, only 34 fast radio bursts-intense bursts of radio emission from beyond our Galaxy-have been reported(1,2). Attempts to understand the population as a whole have been hindered by the highly heterogeneous nature of the searches, which have been conducted with telescopes of different sensitivities, at a range of radio frequencies, and in environments corrupted by different levels of radio-frequency interference from human activity. Searches have been further complicated by uncertain burst positions and brightnesses-a consequence of the transient nature of the sources and the poor angular resolution of the detecting instruments. The discovery of repeating bursts from one source(3), and its subsequent localization(4) to a dwarf galaxy at a distance of 3.7 billion light years, confirmed that the population of fast radio bursts is located at cosmological distances. However, the nature of the emission remains elusive. Here we report a well controlled, wide-field radio survey for these bursts. We found 20, none of which repeated during follow-up observations between 185-1,097 hours after the initial detections. The sample includes both the nearest and the most energetic bursts detected so far. The survey demonstrates that there is a relationship between burst dispersion and brightness and that the high-fluence bursts are the nearby analogues of the more distant events found in higher-sensitivity, narrower-field surveys(5).
机译：尽管在过去的十年中付出了巨大的努力，但据报道仅发生了34次快速无线电爆发-来自银河系以外的强烈无线电发射爆发（1,2）。搜寻的高度异质性阻碍了人们对整体人口的了解，这种搜寻是使用不同灵敏度的望远镜，在一定范围的无线电频率以及在受到来自不同程度的射频干扰的破坏的环境中进行的。人类活动。不确定的脉冲串位置和亮度使搜索变得更加复杂，这是信号源的瞬态特性和检测仪器的不良角分辨率的结果。从一个源头（3）重复出现脉冲的发现及其随后的定位（4）到37亿光年距离的矮星系，证实了快速无线电脉冲的种群位于宇宙学距离。但是，发射的性质仍然难以捉摸。在这里，我们报告了对这些突发事件进行良好控制的广域无线电调查。我们发现了20个，在首次检测后的185-1097小时之间的后续观察过程中，没有一个重复。样本包括到目前为止检测到的最近和最活跃的爆发。这项调查表明，爆发色散与亮度之间存在一定的关系，高通量爆发是在高灵敏度，窄场调查中发现的更远距离事件的附近类似物（5）。

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  • 来源
    《Nature》 |2018年第7727期|386-390|共5页
  • 作者

    Shannon R. . M.; Macquart J. -P.; Bannister K. W.; Ekers R. D.; James C. W.; Oslowski S.; Qiu H.; Sammons M.; Hotan A. W.; Voronkov M. A.; Beresford R. J.; Brothers M.; Brown A. J.; Bunton J. D.; Chippendale A. P.; Haskins C.; Leach M.; Marquarding M.; McConnell D.; Pilawa M. A.; Sadler E. M.; Troup E. R.; Tuthill J.; Whiting M. T.; Allison J. R.; Anderson C. S.; Bell M. E.; Collier J. D.; Gurkan G.; Heald G.; Riseley C. J.;

  • 作者单位

    Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic, Australia;

    Curtin Univ, Curtin Inst Radio Astron, Int Ctr Radio Astron Res, Perth, WA, Australia;

    Curtin Univ, Curtin Inst Radio Astron, Int Ctr Radio Astron Res, Perth, WA, Australia;

    Curtin Univ, Curtin Inst Radio Astron, Int Ctr Radio Astron Res, Perth, WA, Australia;

    Curtin Univ, Curtin Inst Radio Astron, Int Ctr Radio Astron Res, Perth, WA, Australia;

    Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic, Australia;

    Curtin Univ, Curtin Inst Radio Astron, Int Ctr Radio Astron Res, Perth, WA, Australia;

    Curtin Univ, Curtin Inst Radio Astron, Int Ctr Radio Astron Res, Perth, WA, Australia;

    Australia Telescope Natl Facil, CSIRO Astron & Space Sci, Bentley, WA, Australia;

    Curtin Univ, Curtin Inst Radio Astron, Int Ctr Radio Astron Res, Perth, WA, Australia;

    Curtin Univ, Curtin Inst Radio Astron, Int Ctr Radio Astron Res, Perth, WA, Australia;

    Curtin Univ, Curtin Inst Radio Astron, Int Ctr Radio Astron Res, Perth, WA, Australia;

    Curtin Univ, Curtin Inst Radio Astron, Int Ctr Radio Astron Res, Perth, WA, Australia;

    Curtin Univ, Curtin Inst Radio Astron, Int Ctr Radio Astron Res, Perth, WA, Australia;

    Curtin Univ, Curtin Inst Radio Astron, Int Ctr Radio Astron Res, Perth, WA, Australia;

    Australia Telescope Natl Facil, CSIRO Astron & Space Sci, Bentley, WA, Australia;

    Curtin Univ, Curtin Inst Radio Astron, Int Ctr Radio Astron Res, Perth, WA, Australia;

    Curtin Univ, Curtin Inst Radio Astron, Int Ctr Radio Astron Res, Perth, WA, Australia;

    Curtin Univ, Curtin Inst Radio Astron, Int Ctr Radio Astron Res, Perth, WA, Australia;

    Curtin Univ, Curtin Inst Radio Astron, Int Ctr Radio Astron Res, Perth, WA, Australia;

    ARC Ctr Excellence All Sky Astrophys CAASTRO, Sydney, NSW, Australia;

    Curtin Univ, Curtin Inst Radio Astron, Int Ctr Radio Astron Res, Perth, WA, Australia;

    Curtin Univ, Curtin Inst Radio Astron, Int Ctr Radio Astron Res, Perth, WA, Australia;

    Curtin Univ, Curtin Inst Radio Astron, Int Ctr Radio Astron Res, Perth, WA, Australia;

    Univ Oxford, Subdept Astrophys, Dept Phys, Oxford, England;

    Australia Telescope Natl Facil, CSIRO Astron & Space Sci, Bentley, WA, Australia;

    Curtin Univ, Curtin Inst Radio Astron, Int Ctr Radio Astron Res, Perth, WA, Australia;

    Curtin Univ, Curtin Inst Radio Astron, Int Ctr Radio Astron Res, Perth, WA, Australia;

    Australia Telescope Natl Facil, CSIRO Astron & Space Sci, Bentley, WA, Australia;

    Australia Telescope Natl Facil, CSIRO Astron & Space Sci, Bentley, WA, Australia;

    Australia Telescope Natl Facil, CSIRO Astron & Space Sci, Bentley, WA, Australia;

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