论文标题
太阳能色球湍流和由于热的Farley-Buneman不稳定性引起的多流体模拟
Multi-fluid Simulation of Solar Chromospheric Turbulence and Heating Due to the Thermal Farley-Buneman Instability
论文作者
论文摘要
模型无法再现对太阳大气中最冷的部分的观察，其中多个电离和中性物种之间的相互作用阻止了准确的MHD表示。本文认为，仪表级静电等离子体不稳定性在这些区域发展并引起加热。我们将这种不稳定性称为热线鲍利人的不稳定性或TFBI。使用来自2.5D辐射MHD Bifrost模拟的参数，我们表明TFBI在染色体中的许多较冷区域都会发展。本文还介绍了TFBI的第一个多流体模拟，并通过在线性状态期间与理论保持密切一致来验证这一新结果。该模拟最终会发展出湍流，我们表征了所得波驱动的加热，等离子体传输和随机运动。这些结果都认为，TFBI的影响有助于太阳观测和辐射MHD模型之间的差异。
Models fail to reproduce observations of the coldest parts of the Sun's atmosphere, where interactions between multiple ionized and neutral species prevent an accurate MHD representation. This paper argues that a meter-scale electrostatic plasma instability develops in these regions and causes heating. We refer to this instability as the Thermal Farley-Buneman instability, or TFBI. Using parameters from a 2.5D radiative MHD Bifrost simulation, we show that the TFBI develops in many of the colder regions in the chromosphere. This paper also presents the first multi-fluid simulation of the TFBI and validates this new result by demonstrating close agreement with theory during the linear regime. The simulation eventually develops turbulence, and we characterize the resulting wave-driven heating, plasma transport, and random motions. These results all contend that effects of the TFBI contribute to the discrepancies between solar observations and radiative MHD models.
