Структура и динамика полярных токовых систем : материалы международного симпозиума «Полярные геомагнитные явления», 25-31 мая, Суздаль, СССР / Акад. наук СССР, Кол. фил. им. С. М. Кирова, Поляр. геофиз. ин-т. – Апатиты : [б. и.], 1988.

I.P.Mastikov, K.D.Danov, M.D.Kartalev PATTERNS OP OPEN MAGNETIC PIEID LINES SITED ON THE DAYSIDE MAGNETOPAUSE ABSTRACT. A generalization t o r more adequate approach is proposed of an already applied idea for obtaining different typea of magnetic field lines, formed by interaction between Earth's and interplanetary magnetic fields- As distinguished from earlier works, the exactly calculated magnetosheath magne tic field is considered as an outside field on the magnetopause. A procedure is developed for finding out under some assumptions the open magnetospheric field lines. Some analysis of the IMP influence on the process is presented. As a first result, patterns of open magnetic field lines sites are pres ented as a function of different directions of the interplanetary magnetic field. This first stage of the study can be succeeded by mapping of the magne- toeheeth electric field on the polar cap along the open field lines. INTRODUCTION. We are utilizing here an idea of avoiding an explicit des cription of the magnetopause structure in an open magnetospheric model, i.e. the real picture of the interaction between the interplanetary magnetic field and the Earth's magnetic field. Instead of the unknown real picture one takes some acceptable scheme, supposed to represent at least qualitatively some most essential properties of the interaction. The main point of the discussed idea ie to consider "inner" and "outer" field, existing close enough to the planet and far enough in the solar wind flow. We shall mention here only some typical stages of this approach, differ ing from each other by the accepted models for "inner" and "outer" magnetic field. Stern (1973) used a constant field as outer and a dipole field as inner in his model (Pig. 1a,b). Alekseev and Belenkaja (1983) generalized Stern's approach (Pig. 2,ab). Following Stern they have derived four basic types of field lines: closed lines (1); lines, unlinked to the Earth (3); and Pig. 1. Schematic view of the field of a dipole immersed in a constant field orthogonal to its axis with the solar wind moving into the plane of the drawing. A - external field parallel to уaxis; b - external field antiparallel to уaxis. Figures from S t e m (1973). У I35