34th Solar Physics Division Meeting, June 2003
Session 10 Transequatorial and other Coronal Structures
Oral, Tuesday, June 17, 2003, 9:00am-12:00noon, Auditorium

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[10.01] Transequatorial Loops: General Statistics

A. A. Pevtsov (National Solar Observatory)

Transequatorial loops (TLs), -- coronal structures connecting magnetic fields in opposite hemispheres -- were first found in Skylab data, and later studied in more detail using Yohkoh SXT images. TLs are most clearly found in a few MK data (including EIT284Å). They may connect quiet Sun and/or active region areas in opposite hemispheres. In some cases, TLs may develop shortly after emergence of active region magnetic field, but sometimes they may be present before the active region emerges. Helicity of connected areas appears to play more important role that the separation between the regions. In most cases interconnected regions have the same sign of helicity. Often, TLs may connect two regions of same helicity that are far apart (> 70o) and be absent between much closer regions (< 20o) whose helicity is opposite to each other. There is an indication that TLs may repeatedly appear at certain longitudes, similar to complexes of activity.

In this talk, I will review the observational properties of transequatorial loops and the corresponding magnetic fields.


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Bulletin of the American Astronomical Society, 35 #3
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