Causes of the divergence of magnetic tube photospheric bases in AR 10930 |
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| Authors: | V I Sidorov Yu V Kuz’minykh S A Yazev |
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| Institution: | 1. Institute of Solar-Terrestrial Physics, Siberian Branch, Russian Academy of Sciences, P.O. Box 4026 (291), Irkutsk, 664033, Russia
2. Astronomical Observatory, Irkutsk State University, Sovetskaya 19 A, Irkutsk, 664009, Russia
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| Abstract: | It is traditionally considered that the bases of emerging magnetic tubes, which are observed as magnetic elements (tube ??sections??) moving away from one another at the photospheric level, diverge completely because tubes are loop-shaped below the photosphere. It is assumed that there may be more causes. The possible Ampere force contribution to the divergence of the photospheric bases of a coronal magnetic rope (the magnetic tube system) with a current has been considered based on the evolution of photospheric magnetic fields in active region 10930 during December 8?C13, 2006. It has been concluded that the contributions of the emergence and horizontal motion caused by the Ampere force to the divergence of magnetic tube photospheric bases with a current can be comparable in magnitude. |
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