A GLOBAL MAGNETIC TOPOLOGY MODEL FOR MAGNETIC CLOUDS. II.

作者：Hidalgo M A^*

来源：Astrophysical Journal, 2013, 766(2): 125.

DOI：10.1088/0004-637X/766/2/125

• magnetic fields
• solar-terrestrial relations
• solar wind
• Sun: coronal mass ejections (CMEs)
• Sun: magnetic topology

In the present work, we extensively used our analytical approach to the global magnetic field topology of magnetic clouds (MCs), introduced in a previous paper, in order to show its potential and to study its physical consistency. The model assumes toroidal topology with a non-uniform (variable maximum radius) cross-section along them. Moreover, it has a non-force-free character and also includes the expansion of its cross-section. As is shown, the model allows us, first, to analyze MC magnetic structures-determining their physical parameters-with a variety of magnetic field shapes, and second, to reconstruct their relative orientation in the interplanetary medium from the observations obtained by several spacecraft. Therefore, multipoint spacecraft observations give the opportunity to infer the structure of this large-scale magnetic flux rope structure in the solar wind. For these tasks, we use data from Helios (A and B), STEREO (A and B), and Advanced Composition Explorer. We show that the proposed analytical model can explain quite well the topology of several MCs in the interplanetary medium and is a good starting point for understanding the physical mechanisms under these phenomena.

• 出版日期2013-4-1