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Determination of constant α force-free solar magnetic fields from magnetograph data

✍ Scribed by N. Seehafer


Publisher
Springer
Year
1978
Tongue
English
Weight
419 KB
Volume
58
Category
Article
ISSN
0038-0938

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✦ Synopsis


At first it is shown that a magnetic field being force-free, i.e. satisfying V • B = aB, with a = constant (ct r O) in the whole exterior of the Sun cannot have a finite energy content and cannot be determined uniquely from only one magnetic field component given at the photosphere. Then the boundary value problem for a semi-infinite column of arbitrary cross section is solved by a Green's function method.


📜 SIMILAR VOLUMES


Calculation of force-free magnetic field
✍ Takashi Sakurai 📂 Article 📅 1981 🏛 Springer 🌐 English ⚖ 794 KB

A numerical method is developed for solving the force-free magnetic field equation, V • B = aB, with spatially-varying c~. The boundary conditions required are the distribution of Bn (viz. normal component of the field on the photosphere) as well as the value of a in the region of positive (or negat

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✍ Zhen-Cheng Chen; Jing-Xiu Wang 📂 Article 📅 1986 🏛 Springer 🌐 English ⚖ 646 KB

In this paper we present a physical model which uses boundary conditions which seem to correspond more appropriately to actual situations. A boundary value problem of solar force-free magnetic field with constant ct has been specified to represent the discretely concentrated characteristics of the l