从GRB 221009A发出的非常高能发射的可观测性
Giorgio Galanti1, Lara Nava2,3, Marco Roncadelli2,4
1INAF, Istituto di Astrofisica Spaziale e Fisica Cosmica di Milano, Via Alfonso Corti 12, I-20133 Milano, Italy.
Physical review letters
|January 5, 2024
概括
来自GRB 221009A的超高能马射线被检测到,但它们的生存是令人费解的. 轴状粒子 (ALP) 显著减少光子衰减,解释了这些极端的宇宙射线观测.
科学领域:
- 高能天体物理学 高能天体物理学
- 粒子物理学的粒子物理学.
- 宇宙学的宇宙学是什么?
背景情况:
- 由LHAASO和Carpet-2探测到来自马射线爆发GRB 221009A的超高能马射线,这是一个挑战,因为预计外星系背景光会严重减弱.
- 观察到的光子达到高达18 TeV的能量,其中一个事件在251 TeV,这很难与标准天体物理模型和已知的光子物质相互作用相协调.
研究的目的:
- 为了解释GRB 221009A中超高能TeV光子的生存,尽管预计有显著的衰减.
- 为了研究状粒子 (ALP) 在减少光子光学深度方面的潜在作用.
- 为了测试像洛伦兹不变违规等替代解释.
主要方法:
- 用LHAASO-WCDA检测到高达7 TeV的马射线的光谱分析.
- 观察到的光子流量与考虑到银河系外背景光衰减的预测进行比较.
- 在具有特定质量和两个光子合参数的轴状粒子存在时建模光子传播.
- 评估拟议的ALP模型与现有的实验约束和先前观察的一致性.
主要成果:
- 存在的axion-like粒子质量约为10^-11到10^-7 eV和两个光子的合 (3-5)x10^-12 GeV^-1可以显著减少TeV光子的光学深度.
- 这种减弱减弱成功地解释了LHAASO和Carpet-2对GRB 221009A的高能光子的检测.
- 发现洛伦兹不变违规可能解释了地毯-2的观测,但不能解释LHAASO数据.
结论:
- 类似轴子粒子是从GRB 221009A中检测到的令人惊的高能马射线的可行解释.
- 拟议的ALP与当前的实验约束相一致,并且可能构成冷暗物质的组成部分.
- 这些发现凸显了ALP在理解高能天体物理现象以及粒子物理学与宇宙学之间的相互联系方面的重要性.
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