О принципах описания нулевых точек высших порядков магнитного поля в пространстве

Лукашенко, А.Т.; Веселовский, И.С.

Авторы: Лукашенко А.Т., Веселовский И.С.
Сборник: Труды XIX Всероссийской ежегодной конференции по физике Солнца «Солнечная и солнечно-земная физика – 2015»
Серия: ISSN 0552-5829
Год издания: 2015
Место издания: Санкт-Петербург
Первая страница: 261
Последняя страница: 264
Аннотация: In the processes on the Sun a topological structure of the magnetic field, for which null points are a part of, plays an important role. Finding those lines, where the magnetic field vector directs along the position vector or vanishes, can help to describe magnetic nulls. We call such lines reference rays. In the vicinity of the most typical (non-degenerate) 1st order null point there are six non-zero reference rays, composing three mutually perpendicular lines [1,2]. In the vicinity of the most typical point of 2nd order — up to 14 reference rays, which are also non-zero and may have different mutual arrangement in the space. The presence of null lines (one possible in the case of 1st order and up to three in the 2nd) means degeneration. In these cases one needs to take into account along these lines higher order terms of the Taylor expansion. It is also possible purely geometric degeneration (the appearance of additional symmetries). The results may be useful not only for the null point description, but also in other applications relating to the analysis of expansion in spherical harmonics. [1] Parnell C.E., Smith J.M., Neukirch T., Priest E.R. The structure of three-dimensional magnetic neutral points // Phys. Plasmas. V. 3. P. 759–770. 1996. [2] Dumin Yu.V., Somov B.V. What is generic structure of the 3D null-point magnetic reconnection? // arXiv:1407.6039v2 [physics.plasm-ph]. 2015.
Добавил в систему: Лукашенко Анастасия Тарасовна

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