二元中子星合并作为最高能量宇宙射线的来源
1Center for Cosmology and Particle Physics, Department of Physics, New York University, New York, New York 10003, USA.
Physical review letters
|March 14, 2025
概括
双中子恒星的合并可能会产生超高能宇宙射线 (UHECR). 该模型解释了UHECRs的狭窄能量范围,并预测了高能中微子和引力波之间的巧合.
科学领域:
- 天体物理学 天体物理学
- 宇宙射线物理学 宇宙射线物理学
- 引力波天文学 引力波天文学
背景情况:
- 超高能宇宙射线 (UHECR) 呈现出狭窄的刚性范围,这一现象目前的天体物理模型无法完全解释.
- 双中子恒星 (BNS) 合并是具有能量喷射的强大宇宙事件,但它们在UHECR产生中的作用尚未得到充分探索.
研究的目的:
- 提出和研究二进制中子星 (BNS) 合并作为超高能宇宙射线 (UHECR) 的主要来源.
- 为了解释在BNS合并框架内观察到的UHECR的狭窄刚性范围.
- 探索从BNS合并中检测高能中微子和引力波的巧合信号的潜力.
主要方法:
- 在BNS合并中建模喷气式生产机制,重点关注引力驱动动力马的作用.
- 模拟BNS聚合喷气中粒子的加速和传播.
- 分析来自BNS合并的宇宙射线的预期光谱和组成,包括来自BNS合并的r过程核.
主要成果:
- 在BNS合并中,引力驱动的动力发电机自然会产生具有几乎相同特性的喷气,这解释了UHECRs狭窄的刚性范围.
- 能量超过100 EeV的UHECR可以归因于在BNS合并期间弹出的r过程核.
- 该模型预测了能量高于10 PeV的中微子和来自BNS合并的引力波事件之间的可观测的巧合.
结论:
- 双中子恒星的合并为超高能宇宙射线的起源提供了可行的和一致的解释.
- 这种情况消除了对异国情调或未知的来源的需求,以解释观测到的最高能量宇宙射线.
- 预测的高能中微子和引力波的巧合检测为这个BNS合并UHECR生产机制提供了一个独特的观测测试.
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