论文标题
纵向波在阿尔文波驱动的太阳能/恒星风中的作用
Role of Longitudinal Waves in Alfven-wave-driven Solar/Stellar Wind
论文作者
论文摘要
我们研究了P-Mode样垂直振荡在光球中在Alfven-Wave驱动的风中驱动太阳风中的作用。通过执行从光球到星际空间的一维磁流失动力学模拟，我们发现随着光球纵向扰动的幅度的增加，质量损失的速率高达4倍。当添加纵向波动时，横向波是通过纵向波的模式转化产生的，从而增加了电晕中的Alfgenic Poynting Flux。结果，冠状加热通过色层蒸发增强以产生更高的冠状密度，从而导致质量减少速率的增加。我们的发现清楚地表明了P模式振荡在光球中的重要性以及色球圈中的模式转换在确定来自太阳和太阳能恒星的风的基本特性方面的重要性。
We study the role the the p-mode-like vertical oscillation on the photosphere in driving solar winds in the framework of Alfven-wave-driven winds. By performing one-dimensional magnetohydrodynamical numerical simulations from the photosphere to the interplanetary space, we discover that the mass-loss rate is raised up to 4 times as the amplitude of longitudinal perturbations at the photosphere increases. When the longitudinal fluctuation is added, transverse waves are generated by the mode conversion from longitudinal waves in the chromosphere, which increases Alfvenic Poynting flux in the corona. As a result, the coronal heating is enhanced to yield higher coronal density by the chromospheric evaporation, leading to the increase of the mass-loss rate. Our findings clearly show the importance of the p-mode oscillation in the photosphere and the mode conversion in the chromosphere in determining the basic properties of the wind from the sun and solar-type stars.
