标题： 通过小尺度通量涌现驱动的增强环拓不稳定性的太阳爆发加速 显示英文标题

标题： Acceleration of Solar Eruptions via Enhanced Torus Instability Driven by Small-Scale Flux Emergence

摘要： 尽管经过数十年的研究，太阳爆发的启动和加速的基本过程仍未完全被理解，这使得它们成为太阳物理中的长期难题和挑战性问题。 最近，古德太阳望远镜的高分辨率观测揭示了太阳活动区局部区域在爆发前的小尺度磁通量浮现现象。 尽管这些浮现的磁通量比整个活动区小得多，但它们的强度可达2000 G。为了研究它们的影响，我们进行了数据约束的磁流体动力学（MHD）模拟。 我们发现，虽然小尺度浮现磁通量不会显著改变爆发前的演化，但它通过增强环面不稳定性在非线性阶段的增长，显著加速了主阶段的爆发。 这种增强与衰减指数分布无关。 我们的分析表明，爆发前演化中的细微差异可以强烈影响后续动力学，这表明小尺度浮现磁通量可能在加速太阳爆发中起着关键作用。 显示英文摘要

摘要： Despite decades of research, the fundamental processes involved in the initiation and acceleration of solar eruptions remain not fully understood, making them long-standing and challenging problems in solar physics. Recent high-resolution observations by the Goode Solar Telescope have revealed small-scale magnetic flux emergence in localized regions of solar active areas prior to eruptions. Although much smaller in size than the entire active region, these emerging fluxes reached strengths of up to 2000 G. To investigate their impact, we performed data-constrained magnetohydrodynamic (MHD) simulations. We find that while the small-scale emerging flux does not significantly alter the pre-eruption evolution, it dramatically accelerates the eruption during the main phase by enhancing the growth of torus instability, which emerges in the nonlinear stage. This enhancement occurs independently of the decay index profile. Our analysis indicates that even subtle differences in the pre-eruption evolution can strongly influence the subsequent dynamics, suggesting that small-scale emerging flux can play a critical role in accelerating solar eruptions.