致密天体物理环境中PeV中微子产生TeV光子
Generation of TeV Photons by PeV Neutrinos in Dense Astrophysical Environments
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中文总结 AI 辅助
该研究提出致密天体环境中PeV中微子与核子相互作用产生TeV光子的机制，解释了GRB 221009A的暴前TeV光子，为多信使天文学提供新见解。
中文摘要 AI 辅助
IceCube和KM3Net近期对PeV量级超高能（UHE）中微子的观测，以及Tibet ASγ、MAGIC、Carpet-3、LHAASO等地面观测站对蟹状星云、银心、伽马射线暴等各类源的TeV-PeV光子探测，表明存在能将粒子加速至超高能的极端天体物理环境。这些发现推动了对这类环境中UHE中微子与光子间可能联系的研究。理论上，致密天体周围的致密区域可高效产生UHE中微子。本研究计算了中微子-核子相互作用产生UHE光子的过程，并指出若这些相互作用发生在致密环境的外层光学薄区域，产生的光子可能被观测到。在我们的模型中，入射中微子与核子散射，生成的次级部分子强子化形成π介子，随后衰变产生UHE光子。我们计算了对应的光子能谱，发现能量高于1 PeV的入射（反）中微子，产生能量超过1 TeV的光子的概率大于13%。作为具体应用，我们表明该机制可定量解释GRB 221009A中观测到的暴前TeV光子，为其能量和领先时间提供了自然解释。这些发现确立了将UHE中微子事件与伽马射线观测联系起来的合理机制，为极端天体物理环境中的强子过程提供了新见解，并支持多信使天文学研究。
英文摘要
Recent observations by IceCube and KM3Net of PeV-scale ultra-high-energy (UHE) neutrinos, together with detections of TeV-PeV photons from various sources such as the Crab Nebula, the Galactic Center, and gamma-ray burst by ground-based observatories including Tibet AS$γ$, MAGIC, Carpet-3, and LHAASO, point to the existence of extreme astrophysical environments capable of accelerating particles to ultra-high energies. These findings motivate investigations of possible connections between UHE neutrinos and photons in such environments. Theoretically, dense regions surrounding compact objects can efficiently produce UHE neutrinos. In this work, we calculate the production of UHE photons from neutrino-nucleon interactions, and note that if these interactions occur in the outer, optically thin regions of dense environments, the resulting photons could potentially be observed. In our model, an incident neutrino scatters off a nucleon, generating secondary partons that hadronize into pions and subsequently decay into UHE photons. We calculate the resulting photon energy spectra and find that for incident (anti)neutrinos with energies above 1 PeV, the probability of producing photons with energies exceeding 1 TeV is greater than 13%. As a concrete application, we show that this mechanism can quantitatively account for the preburst TeV photons observed in GRB 221009A, providing a natural explanation for both their energies and lead times. These findings establish a plausible mechanism linking UHE neutrino events to gamma-ray observations, providing new insights into hadronic processes in extreme astrophysical environments and supporting multi-messenger astronomy studies.
发表机构
- The Hong Kong University of Science and Technology（香港科技大学）
- Jockey Club Institute for Advanced Study, The Hong Kong University of Science and Technology（香港科技大学聚龙高等研究院）
- School of Physics, Peking University（北京大学物理学院）
- Center for Gravitational Wave Experiment, National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences（中国科学院力学研究所微重力国家实验室引力波实验中心）
- Department of Physics, Chongqing University（重庆大学物理学院）
- School of Physics, Zhengzhou University（郑州大学物理学院）
机构由 AI 辅助整理，请以论文原文为准。
