论文标题
在太阳能耀斑期间在磁自由能中发现的扭转藻抗振荡
Torsional Alfvénic Oscillations Discovered in the Magnetic Free Energy During Solar Flares
论文作者
论文摘要
我们报告了太阳耀斑中扭转的Alfvénic振荡的发现，这调节了磁性自由能$ e_f（t）$的时间演变，而磁性势能$ e_p（t）$是不相关的，而非电位能量则随$ e_ {np}（np}（t）= e_p + e_p + e_f + e_f（t）$而变化。观察到的扭转振荡的平均时间段为$ p_ {obs} = 15.1 \ pm 3.9 $ min，平均场线长度为$ l = 135 \ pm35 $ mm，平均相位速度为$ v_ {stape} = 315 \ pm 120 $ 120 $ s $ s $ s $ s $^{ - 1} $，我们可以解释为nciantial as as as y him and and lod and lod nciantial lobs nciantial and and lop。密度。发现大多数扭转振荡都没有衰减，但是自由能的演变表现出正趋势或负趋势，表明新的新出现的通量（如果为正），磁取消或耀斑能量耗散（如果负面）。自由能的时间演变已经在这项研究中计算出{\ sl垂直电流近似（版本4）非线性无力场（VCA4-NLFFF）}代码，该代码结合了解决方案中的自动检测到的冠状环，并绕过了传统的NLLFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFfffffffffffsodem overses的非责任无关。
We report the discovery of torsional Alfvénic oscillations in solar flares, which modulate the time evolution of the magnetic free energy $E_f(t)$, while the magnetic potential energy $E_p(t)$ is uncorrelated, and the nonpotential energy varies as $E_{np}(t) = E_p + E_f(t)$. The mean observed time period of the torsional oscillations is $P_{obs}=15.1 \pm 3.9$ min, the mean field line length is $L=135\pm35$ Mm, and the mean phase speed is $v_{phase} =315 \pm 120$ km s$^{-1}$, which we interpret as torsional Alfvénic waves in flare loops with enhanced electron densities. Most of the torsional oscillations are found to be decay-less, but exhibit a positive or negative trend in the evolution of the free energy, indicating new emerging flux (if positive), magnetic cancellation, or flare energy dissipation (if negative). The time evolution of the free energy has been calculated in this study with the {\sl Vertical-Current Approximation (Version 4) Nonlinear Force-Free Field (VCA4-NLFFF)} code, which incorporates automatically detected coronal loops in the solution and bypasses the non-forcefreeness of the photospheric boundary condition, in contrast to traditional NLFFF codes.
