Small-scale Magnetic Field Diagnostics outside Sunspots: Comparison of Different Methods

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

We analyse different observational data related to the prob-lem of intrinsic magnetic field strength in small-scale fluxtubes outside sunspots. We conclude that the kG range of fluxtube fields follows from not only classical line ratio method, but also from other old and new tech-niques. For the quiet regions on the Sun, the most probable mode of such fields has a magnetic field strength of 1.2-1.5 kG assuming the rectangular field profile. To best interpret the observations, a weak background field between fluxtubes should be assumed, and its magnetic field strength is expected to increase with the filling factor of fluxtubes. The alternative point of view about subkilogauss fluxtube fields is critically examined, and possible sources of different conclusions are presented.

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