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A New Explanation for the Origin of Trans-equatorial Loops based on a Dynamo Model

Jiang, Jie and Choudhuri, Arnab Rai and Wang, Jingxiu (2007) A New Explanation for the Origin of Trans-equatorial Loops based on a Dynamo Model. In: Solar Physics, 245 (1). pp. 19-25.

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Trans-equatorial loops (TLs) are one of the distinct magnetic structures in the solar corona and have a close relationship to solar activity. We present a systematic study of the origin of TLs linking with the Babcock – Leighton dynamo process based on the model of Chatterjee, Nandy, and Choudhuri (Astron. Astrophys. 427, 1019, 2004). We propose that TLs are visible signatures of poloidal field lines across the equator. The cycle variation of TL lengths obtained by the connectivities of poloidal field lines happens to be roughly in agreement with what one gets by considering the positions of sunspots. This explains why this cycle variation of TL lengths was found to be in conformity with Spörer’s law. The active regions always make the poloidal field configuration favorable to form TLs, which causes the conformity. The formation of TLs is a three-dimensional problem, which will require three-dimensional dynamo models for full investigation.

Item Type: Journal Article
Publication: Solar Physics
Publisher: Springer Netherlands
Additional Information: Copyright of this article belongs to Springer Netherlands.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 13 Nov 2007
Last Modified: 19 Sep 2010 04:41
URI: http://eprints.iisc.ac.in/id/eprint/12472

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