arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0711.2277astro-ph
收藏

关联瞬发GRB光子和中微子

Correlating prompt GRB photons with neutrinos

Ignacio Taboada, Michelangelo V. D'Agostino

摘要:

在中微子天体物理学理论中,标准的做法是使用基于能带函数的破幂律近似来描述伽马射线暴瞬发辐射的平均光子通量。我们将证明这种近似高估了高能伽马射线的贡献(而低估了低能伽马射线)。因此,依赖于这种近似的模型高估了中微子事件率约2倍,这取决于GRB方向上的地球柱密度。此外,触发km^3探测器的中微子的特征能量通常为10^{16} eV,高于先前的预测。我们还提供了一个新的破幂律近似的带函数,并表明它正确地代表了光子光谱。

英文摘要:

It is standard in theoretical neutrino astrophysics to use a broken power law approximation, based on the Band function, to describe the average photon flux of the prompt emission of Gamma-Ray Bursts. We will show that this approximation overestimates the contribution of high energy gamma-rays (and underestimates low energy gamma-rays). As a consequence models that rely on this approximation overestimate neutrino event rate by a factor of approx 2 depending on Earth's column density in the direction of the GRB. Furthermore the characteristic energy of neutrinos that trigger a km^3 detector is typically 10^{16} eV, higher than previously predicted. We also provide a new broken power law approximation to the Band function and show that it properly represents the photon spectra.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑