论文标题
聚合物喷气机对太阳spicules森林的起源和性质进行了启示
Polymeric jets throw light on the origin and nature of the forest of solar spicules
论文作者
论文摘要
Spicules是等离子体喷头，在可见的太阳表面和热力电晕之间的动态界面区域中观察到。在任何给定的时间，据估计，太阳上大约有300万个Spicules。当两者都受到谐波强迫时，我们发现在太阳样气氛中的模拟细胞森林与大量聚合物流体的喷射量之间有一个有趣的相似之处。在具有地下对流的辐射磁流体动力学模拟中，太阳能全球表面振荡与这些谐波振动相似。因此，喷气机的匹配与在太阳的观察结果中检测到的spicules森林非常好。 Taken together, the numerical simulations of the Sun and the laboratory fluid dynamics experiments provide insights into the mechanism underlying the ubiquity of jets: the nonlinear focusing of quasi-periodic waves in anisotropic media of magnetized plasma as well as polymeric fluids under gravity is sufficient to generate a forest of spicules on the Sun.
Spicules are plasma jets, observed in the dynamic interface region between the visible solar surface and the hot corona. At any given time, it is estimated that about 3 million spicules are present on the Sun. We find an intriguing parallel between the simulated spicular forest in a solar-like atmosphere and the numerous jets of polymeric fluids when both are subjected to harmonic forcing. In a radiative magnetohydrodynamic numerical simulation with sub-surface convection, solar global surface oscillations are excited similarly to those harmonic vibrations. The jets thus produced match remarkably well with the forests of spicules detected in observations of the Sun. Taken together, the numerical simulations of the Sun and the laboratory fluid dynamics experiments provide insights into the mechanism underlying the ubiquity of jets: the nonlinear focusing of quasi-periodic waves in anisotropic media of magnetized plasma as well as polymeric fluids under gravity is sufficient to generate a forest of spicules on the Sun.
