论文标题
GRB 221009a的伽马射线爆发模型的约束：Gev Gamma Rays V.S.高能中微子
Constraints on the Model of Gamma-ray Bursts and Implications from GRB 221009A: GeV gamma rays v.s. High-energy Neutrinos
论文作者
论文摘要
通常认为伽马射线爆发（GRB）是有效的粒子加速器。在GRB射流中存在能量质子的情况下，这些质子与GRB强烈的辐射场之间的相互作用应该诱导电磁级联反应。级联产生的电子/正面子将产生额外的强大功能，该功能的形式是幂律分布，直至GEV制度，其索引为$ \ lyssim 2 $。我们建议在GEV频段的Fermi-LAT测量可以对关键GRB模型参数（例如耗散半径，射流的大量Lorentz因子和Baryon加载因子）提供独立的约束。以Grb 221009a为例，以GRB 221009a检测到的最亮的GRB，我们表明，GEV伽马射线发射的约束可能比中微子观察到的限制可能更为严格，从而使我们对GRB的起源有深入的了解。
Gamma-ray bursts (GRB) are generally believed to be efficient particle accelerators. In the presence of energetic protons in a GRB jet, interactions between these protons and intense radiation field of the GRB are supposed to induce electromagnetic cascade. Electrons/positrons generated in the cascade will produce an additional spectrum of robust feature, which is in the form of a power-law distribution up to GeV regime with an index of $\lesssim 2$. We suggest that measurements of Fermi-LAT at GeV band can provide independent constraints on the key GRB model parameters such as the dissipation radius, the jet's bulk Lorentz factor, and the baryon loading factor. Taking GRB 221009A, the brightest GRB ever detected, as an example, we show that the constraints from GeV gamma-ray emission may be more stringent than that from the neutrino observation, providing us a deep insight into the origin of GRBs.
