论文标题
GRB喷气机的密集环境对乳癌外中微子背景的贡献
Contribution to the extragalactic neutrino background from dense environment of GRB jets
论文作者
论文摘要
由于GEV-TEV能量范围内的γ-射线发射的观察到，长伽马射线爆发（GRB）目前是颗粒加速度加速相对论能量的广泛确认的位点。我们考虑了一种场景，在这种情况下，该机理也加速电子也导致了GRB喷射中的Hadron的加速到多PEV能量。由于长GRB的祖细胞是仍然沉浸在密集的恒星簇中的巨大恒星，因此这些Hadron可以在逃离射流后与物质有效相互作用。我们通过那些哈德子与GRB周围巨大的云层的相互作用来计算中微子的光谱。这些中微子在时间尺度上由云中的扩散时间尺度确定的时间尺度形成余辉。由于这么长的延迟，他们对任何特定GRB的识别是不可能的。我们估计了中微子从这种次要的贡献到Icecube天文台最近报道的阿加拉术中微子背景的贡献。
Long gamma-ray bursts (GRBs) are at present well confirmed sites of acceleration of particles to relativistic energies due to observations of gamma-ray emission in the GeV-TeV energy range. We consider a scenario in which the mechanism accelerating electrons is also responsible for acceleration of hadrons in the GRB jets to multi-PeV energies. Since progenitors of long GRBs are massive stars still immersed in dense stellar clusters, these hadrons can efficiently interact with the matter after escaping from the jet. We calculate the spectra of neutrinos from the interaction of those hadrons with the matter of a huge cloud surrounding GRB. Those neutrinos form an afterglow on a time scale determined by their diffusion time scale in the cloud. Due to this long delay, their identification with any specific GRB is not possible. We estimate contribution of neutrinos from such afterglows to the extragalactic neutrino background recently reported by the IceCube Observatory.
