在马射线爆发中,即时光学和即时马射线发射之间的联系是马射线爆发
W T Vestrand1, P R Wozniak, J A Wren
1Los Alamos National Laboratory, Space Science and Applications Group, ISR-1, MS-D466, Los Alamos, New Mexico 87545, USA. vestrand@lanl.gov
Nature
|May 13, 2005
概括
马射线爆发 (GRB) 的快速光学发射提供了对它们发动机的洞察. GRB 041219a显示了相关的光学和马射线信号,表明来自内部冲击的共同起源.
科学领域:
- 天体物理学 天体物理学
- 高能天体物理学 高能天体物理学
- 宇宙马射线爆发 (GRBs) 是一个
背景情况:
- 随着马射线爆发 (GRBs) 的快速光学发射提供了关于爆炸引擎,弹射物质和相互作用的关键信息.
- 此前,只有GRB 990123表现出可检测的即时光学辐射,这种辐射是可变的,与马射线无关,这表明反向冲击起源.
- 这种无关联的辐射受到周围环境的影响.
研究的目的:
- 报告和分析来自宇宙马射线爆发GRB 041219a的即时光学辐射.
- 调查GRBs中即时光学和马射线辐射的起源和关系.
- 为了利用相关的光学辐射作为GRB喷气的直接探测器.
主要方法:
- 观察和分析来自GRB 041219a的即时光学辐射.
- 对比光学和马射线辐射的时间和变化.
- 在标准火球模型中对GRB的解释.
主要成果:
- 来自GRB 041219a的即时光学辐射被检测到,并发现是可变的.
- 光学发射与即时的马射线发射有很强的相关性.
- 这种相关性表明这两种排放成分的共同起源.
结论:
- 来自GRB 041219a的相关光学辐射归因于爆炸喷射物中的内部冲击,由内部发动机变化驱动.
- 这一发现支持GRB的标准火球模型.
- 相关的光学辐射作为GRB喷气的直接探测器,独立于外部介质.
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