由于局部和全局自发扰动引起的慢模和香肠环模激发
Slow and sausage loop mode excitation due to local and global spontaneous perturbations
摘要：
我们分析了不同类型的扰动的能力-与通常的环境能量波动的太阳日冕-激发慢和香肠模式的太阳耀斑循环。我们进行数值模拟的MHD理想方程考虑直等离子体磁管受本地和全球的能量沉积。我们发现典型的微耀斑[ $\sim$（$10^{27}$- $10^{30}$）erg]的局部环能量沉积倾向于驱动慢激波，从而诱导慢模式图案。慢模式的功能，获得每个测试的本地能量沉积内的环路。同时，为了获得可观察的香肠模式图案，需要能够瞬时修改内部回路温度的全局扰动，即特征传导加热时间必须远小于辐射冷却时间。通过改变参数$β$进行的实验表明，香肠模式的激励并不依赖于该参数的值，但在全球或本地的能源字符显着。
英文摘要：
We analyse the capability of different type of perturbations -associated with usual environment energy fluctuations of the solar corona- to excite slow and sausage modes in solar flaring loops. We perform numerical simulations of the MHD ideal equations considering straight plasma magnetic tubes subject to local and global energy depositions. We find that local loop energy depositions of typical microflares [$\sim$($10^{27}$-$10^{30}$) erg] are prone to drive slow shock waves that induce slow mode patterns. The slow mode features are obtained for every tested local energy deposition inside the loop. Meanwhile, to obtain an observable sausage mode pattern a global perturbation, capable to modify instantaneously the internal loop temperature, is required, i.e. the characteristic conductive heating time must be much smaller than the radiative cooling one. Experiments carried out by varying parameter $β$ show us that the excitation of sausage modes does not depend significantly on the value of this parameter but on the global or local character of the energy source.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
