论文标题
由alfvén脉冲驱动的准周期性曲霉状的酷喷射
Quasi-periodic spicule-like cool jets driven by Alfvén pulses
论文作者
论文摘要
我们执行2.5维磁性水力动力学（MHD）模拟，以了解对类似于太阳能球体中类似于Alfvén脉冲的初始横向速度脉冲，因此对Spicule样凉爽喷气机的形成的全面视图。我们在太阳大气中调用多个速度（$ v_ {z} $）脉冲在1.5至2.0毫米之间，从而产生初始的横向速度扰动。这些脉冲由于蓬松力而非线性地传递到磁场的扰动。这种物理过程进一步产生了磁性冲击，然后在太阳大气中进行了准周期性血浆运动。该场对齐的磁性冲击会向上移动，随后导致色球等离子体的准周期性上升和下降，作为薄而凉爽的spicule样喷头。初始施加的横向速度脉冲的大小在50-90 km $ s^{ - 1} $的范围内。发现这些脉冲足够强，可以产生类似旋风的喷头。我们分析了这些类似Spicule的喷气机的演化，运动学和能量学。我们发现，在局部太阳能方面，运输的质量通量和动能密度很大。这些质量动作在$ $ $ quasi periodic振荡中产生$ \ it，其比例为$ \ simeq $ 4.0分钟，高于过渡区域。
We perform a 2.5 dimensional magnetohydrodynamic (MHD) simulation to understand a comprehensive view of the formation of spicule-like cool jets due to initial transverse velocity pulses akin to Alfvén pulses in the solar chromosphere. We invoke multiple velocity ($V_{z}$) pulses between 1.5 and 2.0 Mm in the solar atmosphere, which create the initial transverse velocity perturbations. These pulses transfer energy non-linearly to the field aligned perturbations due to the ponderomotive force. This physical process further creates the magnetoacoustic shocks followed by quasi-periodic plasma motions in the solar atmosphere. The field aligned magnetoacoustic shocks move upward which subsequently cause quasi-periodic rise and fall of the chromospheric plasma into the overlying corona as a thin and cool spicule-like jets. The magnitude of the initial applied transverse velocity pulses are taken in the range of 50-90 km $s^{-1}$. These pulses are found to be strong enough to generate the spicule-like jets. We analyze the evolution, kinematics and energetics of these spicule-like jets. We find that the transported mass flux and kinetic energy density are substantial in the localized solar-corona. These mass motions generate $\it in$ $situ$ quasi-periodic oscillations on the scale of $\simeq$ 4.0 min above the transition region.
