来自不同喷流组成的伽马射线暴的中微子约束和探测前景

Yang-Dong-Jun Ou, Hou-Jun Lü, Xue-Zhao Chang, Xiao-Xuan Liu and En-Wei Liang
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摘要

伽马射线暴(GRBs)的迅速发射机制是一个长期悬而未决的问题,而伽马射线暴一直被认为是高能中微子的潜在来源。尽管冰立方多年来一直在寻找与伽马射线暴相关的中微子事件,但一直没有结果。然而,中微子搜索结果的缺失为我们提供了一个独特的机会来约束GRB喷流模型的参数空间。在本文中,我们选择了四个具有两种不同类型喷流组成的奇特GRB来研究中微子发射。结果发现,只有GRB 211211A可以很好地约束耗散光球模型。通过采用光球的特定参数,可以得到 GRB 211211A 在 fp > 0.2 时的εp/εe < 8。对于内部碰撞诱导磁重联和湍流(ICMART)模型,我们既不能有效地约束GRB 230307A,也不能有效地约束GRB 080916C。此外,我们还研究了来自GRB的高能中微子的探测前景,发现即使在IceCube-Gen2运行期间,也很难从ICMART模型中探测到至少一个与GRB相关的高能中微子。对于类似于GRB 211211A的事件,在IceCube-Gen2运行期间有可能探测到至少一个与引力波重合的中微子,如果这种事件源自光球耗散内紧凑恒星的合并的话。
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Neutrino Constraints and Detection Prospects from Gamma-Ray Bursts with Different Jet Compositions
The prompt emission mechanism of gamma-ray bursts (GRBs) is a long-standing open question, and GRBs have been considered as potential sources of high-energy neutrinos. Despite many years of search for the neutrino events associated with GRBs from IceCube, there were no results. However, the absence of search results for neutrinos provides a unique opportunity to constrain the parameter space of GRB jet models. In this paper, we chose four peculiar GRBs with two different types of jet composition to investigate neutrino emission. It is found that only GRB 211211A could be well constrained within the dissipative photosphere model. By adopting the specific parameters of the photosphere, one can obtain εp/εe < 8 for fp > 0.2 from GRB 211211A. For the Internal-collision-induced Magnetic Reconnection and Turbulence (ICMART) model, we can effectively constrain neither GRB 230307A nor GRB 080916C. Moreover, we also investigate the detection prospects of high-energy neutrinos from GRBs and find that it is difficult to detect at least one high-energy neutrino associated with GRBs from the ICMART model even during the IceCube-Gen2 operation. For the GRB 211211A-like events, it is possible to detect at least one neutrino coincident with the gravitational wave during the IceCube-Gen2 operation, if such an event originated from mergers of compact stars within the photosphere dissipation.
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