共生 recurrent novae 的时变多能中微子发射：吸积盘的作用
Time-dependent multi-energy neutrino emission from symbiotic recurrent novae: the role of accretion disks
AI总结：
本研究构建时变多能框架，以 RS Oph 为基准揭示共生 recurrent novae 的中微子发射特征，发现吸积盘可增强早期 GeV 中微子发射，其 GeV 信号或可被下一代探测器探测，凸显星周结构的关键作用。
AI中文摘要：
共生 recurrent novae 为研究致密星周环境中的热核爆炸、激波演化及非热粒子加速提供了独特实验室。本研究构建了一个时变多能框架，用于描述这类系统的中微子发射，该框架一致纳入了热核失控过程中产生的 MeV 中微子，以及新星驱动激波中强子相互作用产生的 GeV 中微子。以 RS Oph 为基准源，我们对与红巨星星风及白矮星周围致密吸积盘相互作用的激波演化进行建模，结果显示，产生的中微子信号呈现出特征性的双成分时间结构：早期快速上升的 MeV 成分对应核燃烧，随后是由激波传播和粒子加速主导的延迟 GeV 成分。吸积盘的存在可通过为质子-质子相互作用提供致密靶，显著增强早期 GeV 中微子发射，这会在爆发后数小时内形成明显的中微子流量，而在星风主导的场景中不存在这一特征。我们进一步评估了这些信号的可探测性，发现 MeV 成分仍低于当前探测阈值，但来自邻近系统的 GeV 中微子发射可能可被下一代探测器探测到。我们的结果强调了星周结构在塑造新星中微子发射中的关键作用，并证明共生 recurrent novae 是未来多信使观测的有前景目标。
英文摘要：
Symbiotic recurrent novae provide a unique laboratory for studying thermonuclear explosions, shock evolution, and nonthermal particle acceleration in dense circumstellar environments. In this work, we develop a time-dependent, multi-energy framework to describe neutrino emission from such systems, consistently incorporating both MeV neutrinos produced during thermonuclear runaway and GeV neutrinos generated through hadronic interactions in nova-driven shocks. Using RS Oph as a benchmark source, we model the evolution of the shock interacting with both the red giant wind and a dense accretion disk surrounding the white dwarf. We show that the resulting neutrino signal exhibits a characteristic two-component temporal structure: an early, rapidly rising MeV component tracing nuclear burning, followed by a delayed GeV component governed by shock propagation and particle acceleration. The presence of an accretion disk can significantly enhance the early-time GeV neutrino emission by providing a dense target for proton-proton interactions. This leads to a pronounced neutrino flux within the first few hours after eruption, a feature absent in wind-dominated scenarios. We further evaluate the detectability of these signals and find that while the MeV component remains below current detection thresholds, the GeV neutrino emission from nearby systems may become accessible to next-generation detectors. Our results highlight the critical role of the circumstellar structure in shaping nova neutrino emission and demonstrate that symbiotic recurrent novae are promising targets for future multi-messenger observations.
