A Comparison of Solar Open Field Regions Found by Type III Radio Bursts and the Potential Field Source Surface Model
A Comparison of Solar Open Field Regions Found by Type III Radio Bursts and the Potential Field Source Surface Model
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III型射电暴发现的太阳开放场区域与势场源表面模型的比较
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
M. DeRosa
中科院分区：
文献类型：
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作者：
N. Nitta;M. DeRosa
在太阳物理研究和应用中，位场源面（PFSS）模型常被用来外推光球磁场到日冕。在试图评估的PFSS模型的性能，我们比较计算的脚点的日光层磁场与耀斑的位置与III型射电暴，这是一个很好的指标，开放的领域线延伸到行星际空间。与过去的经验一样，这一协议并不令人满意。我们讨论的差异，包括模型的不足，以再现不断变化的活动区域上方的日冕磁场和缺乏一个同步的全表面磁图的可能原因。有人认为，PFSS模型的性能需要进一步量化对太阳观测，包括III型爆发，才适用于日光层模型。
For heliophysics research and applications, the potential field source surface (PFSS) model is often employed to extrapolate the photospheric magnetic field to the corona. In an attempt to evaluate the performance of the PFSS model, we compare the computed footpoints of the heliospheric magnetic field with the locations of flares associated with type III radio bursts, which are a good indicator of open field lines that extend to interplanetary space. Consistent with past experiences, the agreement is not satisfactory. We discuss possible reasons for the discrepancy, including the model’s inadequacy to reproduce the coronal magnetic field above evolving active regions and the lack of a simultaneous full-surface magnetic map. It is argued that the performance of the PFSS model needs to be quantified further against solar observations, including type III bursts, before it is applied to heliospheric models.