论文标题
使用偏振亮度和EUV观测值验证波加热的3D MHD冠状模型
Validation of a wave heated 3D MHD coronal-wind model using Polarized Brightness and EUV observations
论文作者
论文摘要
导致电晕和地球层的形成和演变的物理特性仍未完全了解。 3D MHD全球建模是研究所有可能的候选过程的强大工具。为了充分了解它们的作用,我们需要一个验证过程,在该过程中,与观察数据相比,模拟的输出的数量相比。在这项工作中,我们介绍了我们的验证过程的结果应用于波湍流驱动的3D MHD Corona-Wind模型Windpredict-aw。在模型开发的这个阶段,我们将工作集中在静止状态下的冠状动脉制度上。我们分析了三个模拟结果,这些结果因边界值而异。我们使用密度和温度的3D分布,在第一个Parker太阳探针周围(在太阳能活动的最小值期间)附近的模拟输出,以合成极端紫外线(EUV)和白光极化(WL PB)图像,以重现观察到的Solar Corona。对于这些测试,我们选择了AIA 193 A,211 A和171 A EUV排放,MLSO K-COR和LASCO C2 PB图像获得了2018年11月6日和7月7日。然后,我们对磁盘和肢体Corona进行定量比较。我们表明,我们的模型能够产生与观察到的电晕相当的合成图像。
The physical properties responsible for the formation and evolution of the corona and heliosphere are still not completely understood. 3D MHD global modeling is a powerful tool to investigate all the possible candidate processes. To fully understand the role of each of them, we need a validation process where the output from the simulations is quantitatively compared to the observational data. In this work, we present the results from our validation process applied to the wave turbulence driven 3D MHD corona-wind model WindPredict-AW. At this stage of the model development, we focus the work to the coronal regime in quiescent condition. We analyze three simulations results, which differ by the boundary values. We use the 3D distributions of density and temperature, output from the simulations at the time of around the First Parker Solar Probe perihelion (during minimum of the solar activity), to synthesize both extreme ultraviolet (EUV) and white light polarized (WL pB) images to reproduce the observed solar corona. For these tests, we selected AIA 193 A, 211 A and 171 A EUV emissions, MLSO K-Cor and LASCO C2 pB images obtained the 6 and 7 November 2018. We then make quantitative comparisons of the disk and off limb corona. We show that our model is able to produce synthetic images comparable to those of the observed corona.