Practical Determination of Coronal Magnetic Fields

小行星9320575 研究人员将从磁场的拓扑结构研究太阳日冕中活跃区域的物理特性。 在先前的一项资助中，研究人员开发了一种技术，通过光球磁场的矢量磁像仪测量来确定日冕磁场的配置。 矢量磁谱仪测量磁敏感谱线的塞曼分裂。 研究人员将研究日冕磁场的一些不同性质。 他们将比较活动区日冕场的拓扑结构和据信可以追踪场线的观测特征。 他们还将把耀斑现象的形态与日冕磁场的结构联系起来。 他们将使用一系列磁图研究活动区上方日冕场的演变，并建立活动区磁场的现实模型。 ***

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. ***