论文标题
反复的Nova RS Ophiuchi中的时间分辨的HADRONIC颗粒加速度
Time-resolved hadronic particle acceleration in the recurrent Nova RS Ophiuchi
论文作者
论文摘要
由于二进制伴侣的新鲜材料积聚,复发性的Novae正在重复白矮人外层的热核爆炸。弹出物质产生的冲击物撞向伴侣恒星的风中,将颗粒加速至非常高的能量。我们报告使用高能量立体镜系统,直到2021年爆发后一个月,我们报告了从复发的Nova RS \,Ophiuchi的复发性Nova Rs \,Ophiuchi的gamma射线非常高的能量。 VHE发射具有与低能量GEV发射的类似时间曲线,表明峰值通量为两天的延迟。这些观察结果限制了时间依赖性粒子能量的模型,偏向于缓慢的替代方案的望子发射方案。这证实了密集的震动为有效的宇宙射线加速到极高的能量提供了有利的环境。
Recurrent Novae are repeating thermonuclear explosions in the outer layers of white dwarfs, due to the accretion of fresh material from a binary companion. The shock generated by ejected material slamming into the companion star's wind, accelerates particles to very-high-energies. We report very-high-energy (VHE, $\gtrsim100$\,GeV) gamma rays from the recurrent nova RS\,Ophiuchi up to a month after its 2021 outburst, using the High Energy Stereoscopic System. The VHE emission has a similar temporal profile to lower-energy GeV emission, indicating a common origin, with a two-day delay in peak flux. These observations constrain models of time-dependent particle energization, favouring a hadronic emission scenario over the leptonic alternative. This confirms that shocks in dense winds provide favourable environments for efficient cosmic-ray acceleration to very-high-energies.