Practical Determination of Coronal Magnetic Fields

[9320575] Mikic研究人员将从磁场的拓扑结构研究太阳日冕活动区域的物理性质。在先前的拨款中，研究人员开发了一种技术，通过光球磁场的矢量磁图测量来确定日冕磁场的结构。矢量磁力计测量磁敏谱线的塞曼分裂。研究人员将研究日冕磁场的许多不同性质。他们将把活动区域日冕场的拓扑结构与据信可以追踪磁场线的观测特征进行比较。他们还将把耀斑现象的形态与日冕磁场的结构联系起来。他们将利用一系列磁图研究活动区域上方日冕磁场的演变，并开发活动区域磁场的现实模型。＊＊＊

9320575 Mikic The investigators will study the physical properties of active-regions in the sun's corona from the topology of the magnetic field. In a prior grant, the investigators developed a technique to determine the coronal magnetic field configuration from vector magnetograph measurements of the photospheric magnetic field. Vector magnetographs measure the Zeeman splitting of magnetically sensitive spectral lines. The investigators will study a numer of different properties of coronal magnetic fields. They will compare the topology of active-region coronal fields to observational features believed to trace field lines. They will also relate the morphology of flare phenomena to the structure of the coronal magnetic fields. They will study the evolution of the coronal field above an active region using a sequence of magnetograms and develop realistic models of active region magnetic fields. ***