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一个重复的快速无线电爆发

L G Spitler1, P Scholz2, J W T Hessels3,4

  • 1Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, B-53121 Bonn, Germany.

Nature
|March 3, 2016
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概括

快速无线电爆发 (FRB) 之前被认为是不重复的. 新的观测证实FRB 121102是一个重复的FRB, 挑战以前关于它们起源的理论.

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科学领域:

  • 天文学
  • 天体物理学
  • 宇宙学

背景情况:

  • 快速无线电爆发 (FRB) 是来自银河系外的神秘,持续数毫秒的无线电脉冲.
  • 之前的观察表明FRB是不重复的,
  • 一些FRB的重复性仍然是天体物理学中的一个关键难题.

研究的目的:

  • 调查快速无线电爆发FRB 121102的重复性.
  • 描述反复发射的特性及其来源.
  • 测试有关FRB物理起源的假设.

主要方法:

  • 使用无线电望远镜对FRB 121102进行后续观测.
  • 分析了爆发到达时间,分散度和光谱特性.
  • 与之前的检测数据进行比较以确认重复行为.

主要成果:

  • 从FRB 121102的方向检测到十个额外的爆发, 证实它的重复性.
  • 对所有检测到的爆发进行了一致的分散测量和天空位置.
  • 在短时间尺度上表现出可变的光谱形状,

结论:

  • 无疑FRB 121102是一个重复的FRB, 它的源头在能量事件中幸存下来.
  • 观察到的光谱变化支持一个年轻的,高度磁化的,银河系外中子星的起源.
  • 这些发现有助于了解快速无线电爆发的不同来源.