Improving the Alfvén Wave Solar Atmosphere Model Based on Parker Solar Probe Data
Improving the Alfvén Wave Solar Atmosphere Model Based on Parker Solar Probe Data
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DOI：
10.3847/1538-4357/ac3d34
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发表时间：
2022-02
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通讯作者：
B. van der Holst;J. Huang;N. Sachdeva;J. Kasper;Ward B. Manchester IV;D. Borovikov;B. Chandran;A. Case;K. Korreck;D. Larson;R. Livi;M. Stevens;P. Whittlesey;S. Bale;M. Pulupa;D. Malaspina;J. Bonnell;P. Harvey;K. Goetz;R. Macdowall
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作者：
B. van der Holst;J. Huang;N. Sachdeva;J. Kasper;Ward B. Manchester IV;D. Borovikov;B. Chandran;A. Case;K. Korreck;D. Larson;R. Livi;M. Stevens;P. Whittlesey;S. Bale;M. Pulupa;D. Malaspina;J. Bonnell;P. Harvey;K. Goetz;R. Macdowall
在货车der Holst等人（2019）中，我们使用Alfvén Wave太阳大气模型（AWSoM）与空军数据同化光球通量传输-全球振荡网络组磁图对NASA帕克太阳探测器（PSP）第一次遭遇的日冕和内日光层进行了建模，并对第一次遭遇的太阳风等离子体状态进行了预测。AWSoM使用低频阿尔文波湍流来解决日冕加热和加速问题。在这里，我们修改我们的模拟，通过引入改进的能量划分的波耗散的电子和各向异性质子加热，并使用更好的网格设计。我们将新的AWSoM结果与PSP数据进行了比较，发现与磁场、湍流水平和平行质子等离子体β的一致性得到了改善。为了推断PSP观测到的太阳风的来源，我们使用AWSoM模型来确定2018年11月6日UT 03：27的近日点附近的PSP位置与太阳表面之间的场线连通性。在近日点附近，磁力线可以追溯到赤道附近的负极性区域。
In van der Holst et al. (2019), we modeled the solar corona and inner heliosphere of the first encounter of NASA’s Parker Solar Probe (PSP) using the Alfvén Wave Solar atmosphere Model (AWSoM) with Air Force Data Assimilative Photospheric flux Transport–Global Oscillation Network Group magnetograms, and made predictions of the state of the solar wind plasma for the first encounter. AWSoM uses low-frequency Alfvén wave turbulence to address the coronal heating and acceleration. Here, we revise our simulations, by introducing improvements in the energy partitioning of the wave dissipation to the electron and anisotropic proton heating and using a better grid design. We compare the new AWSoM results with the PSP data and find improved agreement with the magnetic field, turbulence level, and parallel proton plasma beta. To deduce the sources of the solar wind observed by PSP, we use the AWSoM model to determine the field line connectivity between PSP locations near the perihelion at 2018 November 6 UT 03:27 and the solar surface. Close to the perihelion, the field lines trace back to a negative-polarity region about the equator.