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在故障期间维拉脉冲星磁层的变化
Jim Palfreyman1, John M Dickey2, Aidan Hotan3
1University of Tasmania, Sandy Bay, Tasmania, Australia. jim77742@gmail.com.
Nature
|April 13, 2018
概括
在Vela脉冲星中使用单脉冲无线电观测观察到脉冲器故障,即突然的旋转事件. 这些事件揭示了脉冲形状和极化变化,
科学领域:
- 天文学与天体物理学
- 血物理
- 凝聚物质物理学
背景情况:
- 脉冲星通过磁双极辐射失去旋转能量,导致旋转.
- 脉冲器故障是与超流体旋转和角动量交换相关的突然旋转事件.
- 之前的研究缺乏高时间分辨率的数据来分析故障机制.
研究的目的:
- 调查脉冲星故障背后的物理过程.
- 探测中子星内部超流体的特性.
- 分析脉冲星磁层上的故障影响.
主要方法:
- 连续,高时间分辨率的单脉冲无线电观测Vela脉冲星超过三年.
- 检测和分析2016年12月12日发生的故障事件.
- 在故障期间检查脉冲流密度,极化和到达时间.
主要成果:
- 观察到脉冲形状的突然变化,包括宽脉冲和零脉冲.
- 在随后的脉冲中检测到意想不到的低线性极化.
- 记录了2.6秒的脉冲到达时间延迟, 表明磁层效应.
结论:
- 观察到的现象直接证明了超流体的故障机制.
- 高时间分辨率的观测对于了解中子星内部和磁层相互作用至关重要.
- 这项研究为中子星中的状态和超流体特性方程提供了新的约束.
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