GRB 250129A 多时段 afterglow 再显现: 证据表明连续冲击相互作用
高能天体物理现象
2026-03-10 v1
摘要
大多数长型伽玛射线暴(GRB)的 afterglow 符合外部前向冲击的辐射模式，通常以光滑分段幂律衰减描述多波段光度曲线。然而，少数充分采样的 GRB 偏离这一行为，包括GRB 250129A。该事件在X射线和光学波段显示出多个延迟时段的再显现。再显现常被归因于持续的中心引擎活动导致能量注入、延迟壳体碰撞引发的刷新冲击、环境介质中的密度跳变、或视角效应下的角向喷流结构。通过分析在伽玛射线和近红外中观察到的初始发射，我们检讨X射线和光学闪烁事件的起源。通过从经验拟合到贝叶斯推断的方法研究 afterglow 光度曲线中的物理过程，我们获得了等效全向能量E_iso,gamma = (1.35 +/- 0.12) x 10^53 erg。通过采用一种不偏向的贝叶斯框架(NMMA)对 afterglow 进行建模，我们排除了单一外部冲击演化和一次能量注入情景。数值计算表明，再显现事件与来自延迟壳体碰撞引发的刷新冲击相符。基于我们对 GRB 250129A 数据的一致性分析，我们发现该事件在触发后1.1天内发生两个统计显著的再显现事件，可由一系列刷新冲击解释。此类在时序和光谱上丰富的 GRB 数据集为测试当前建模框架提供了强大的手段。
引用
@article{arxiv.2603.08555,
title = {Multi-epoch afterglow rebrightenings in GRB 250129A: Evidence for successive shock interactions},
author = {D. Akl and S. Antier and H. Koehn and P. T. H. Pang and J. J. Geng and R. Gill and E. Abdikamalov and C. Adami and V. Aivazyan and L. Almeida and S. Alshamsi and C. Andrade and Q. André and C. Angulo-Valdez and J. -L. Atteia and K. Barkaoui and S. Basa and R. L. Becerra and P. Bendjoya and D. Berdikhan and E. Bernaud and S. Boissier and S. Brunier and A. Y. Burdanov and N. R. Butler and J. Chen and F. Colas and W. Corradi and M. W. Coughlin and D. Darson and T. Dietrich and D. Dornic and C. Douzet and C. Dubois and J. -G. Ducoin and T. du Laz and A. Durroux and D. Dutton and P. -A. Duverne and F. Dux and E. G. Elhosseiny and A. Esamdin and A. V. Filippenko and F. Fortin and M. Freeberg and L. García-García and M. Gillon and N. Globus and P. Gokuldass and N. Guessoum and P. Hello and R. Hellot and Y. H. M. Hendy and Y. L. Hua and T. Hussenot-Desenonges and R. Inasaridze and A. Iskandar and M. Jelínek and S. Karpov and A. Klotz and N. Kochiashvili and T. Laskar and A. Le Calloch and W. H. Lee and S. Leonini and X. Y. Li and A. Lien and C. Limonta and J. Liu and D. López-Cámara and F. Magnani and J. Mao and M. Mašek and E. Moreno Méndez and L. C. Menegazzi and W. Mercier and B. M. Mihov and M. Molham and S. Oates and M. Odeh and H. Peng and M. Pereyra and M. Pillas and T. Pradier and N. A. Rakotondrainibe and D. Reichart and J. -P. Rivet and F. D. Romanov and F. Sánchez-Álvarez and N. Sasaki and D. Schlekat and B. Schneider and A. Simon and L. Slavcheva-Mihova and R. Strausbaugh and T. R. Sun and A. Takey and M. Tanasan and D. Turpin and A. de Ugarte Postigo and L. T. Wang and X. F. Wang and Z. M. Wang and A. M. Watson and J. de Wit and Y. S. Yan and W. Zheng and S. Zúñiga-Fernández},
journal= {arXiv preprint arXiv:2603.08555},
year = {2026}
}