Grad-Shafranov reconstruction of magnetic clouds: overview and improvements

Details Grad-Shafranov reconstruction of magnetic clouds: overview and improvements Grad-Shafranov reconstruction of magnetic clouds: overview and improvements

2011-08-08

arxiv.org/abs/1108.1678v1

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

16 pages, 13 figures

Scientific paper

10.1007/s11207-011-9845-z

The Grad-Shafranov reconstruction is a method of estimating the orientation (invariant axis) and cross-section of magnetic flux ropes using the data from a single spacecraft. It can be applied to various magnetic structures such as magnetic clouds (MCs) and flux ropes embedded into the magnetopause and in the solar wind. We develop a number of improvements of this technique and show some examples of the reconstruction procedure of interplanetary coronal mass ejections (ICMEs) observed at 1 AU by the STEREO, WIND and ACE spacecraft during the minimum following the solar cycle 23. The analysis is conducted not only for ideal localized ICME events but also for non-trivial cases of magnetic clouds in fast solar wind. The Grad-Shafranov reconstruction gives reasonable results for the sample events, although it possesses certain limitations, which need to be taken into account during the interpretation of the model results.

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