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CORONAL TURBULENCE AND INTERMITTENCY FROM SOLAR ORBITER OBSERVATIONS

机译:太阳能轨道观测的冠状湍流与间歇性

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Turbulent motions and magnetic fields are a key component of coronal heating mechanisms. They are indeed likely to produce the small scales at which the mechanisms such as reconnection are efficient enough. The properties of turbulence (and the associated intermittency) may thus have an influence on the energy dissipation in the corona, and need to be characterized from observations. Although turbulence is omnipresent from the Sun to the heliosphere, good observations of MHD turbulence have not yet been performed in the corona, in lines emitted at high temperature, where the heating actually occurs. We propose a study of coordinated EUSEUI-VIM observations, with better resolution and counting statistics than ever before, whose main goal is to get and interpret the spatial statistics (spectra and structure functions) of the velocity field in lines emitted at high temperatures (log_10 T≥6.4), together with the plasma and magnetic environment of the observed region. These statistics will help us understand the precise role of coronal turbulence in the coronal heating processes.
机译:湍流运动和磁场是冠状加热机构的关键组成部分。它们确实可能产生小鳞片,在该规模上,重新连接的机制足够有效。因此,湍流(和相关间隔)的性质可以影响电晕中的能量耗散,并且需要从观察结果表征。尽管湍流是从太阳到旋光的态度,但是在电晕中尚未在高温下发射的良好观察MHD湍流,其中加热实际发生。我们提出了对协调的Euseui-Vim观测的研究,具有比以往更好的分辨率和计数统计数据,其主要目标是获得和解释高温发射的线路速度场的空间统计(光谱和结构函数)(log_10 T≥6.4),与观察区域的等离子体和磁环境一起。这些统计数据将有助于我们了解冠状加热过程中冠状湍流的确切作用。

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