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MHD Waves and Coronal Heating: Unifying Empirical and MHD Turbulence Models

机译:mHD波和冠状加热:统一经验和mHD湍流   楷模

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摘要

We present a new global model of the solar corona, including the low corona,the transition region and the top of chromosphere. The realistic 3D magneticfield is simulated using the data from the photospheric magnetic fieldmeasurements. The distinctive feature of the new model is incorporating the MHDAlfven wave turbulence. We assume this turbulence and its non-lineardissipation to be the only momentum and energy source for heating the coronalplasma and driving the solar wind. The difference between the turbulencedissipation efficiency in coronal holes and that in closed field regions isbecause the non-linear cascade rate degrades in strongly anisotropic turbulencein coronal holes (no inward propagating wave), thus resulting in colder coronalholes with the bi-modal solar wind originating from them. The detailedpresentation of the theoretical model is illustrated with the synthetic imagesfor multi-wavelength EUV emission compared with the observations from SDO AIAand Stereo EUVI instruments for the Carrington rotation 2107.
机译:我们提出了一种新的全球太阳电晕模型,包括低电晕,过渡区域和色球顶。使用来自光球磁场测量的数据模拟逼真的3D磁场。新模型的显着特征是结合了MHDAlfven波湍流。我们认为这种湍流及其非线性耗散是加热冠状体和驱动太阳风的唯一动量和能量来源。日冕孔的湍流耗散效率与封闭场区域的湍流耗散效率之差是因为在冠状孔的强各向异性湍流中非线性级联速率降低(无向内传播波),从而导致日冕风较冷,而双峰太阳风来自他们。与多波长EUV发射的合成图像以及SDO AIA和Stereo EUVI仪器对Carrington旋转2107的观测结果进行了比较,对理论模型的详细表示进行了说明。

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