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Weak solar magnetic fields

Authors: J. O. Stenflo;

Weak solar magnetic fields

Abstract

Intrinsically weak magnetic fields are difficult to identify, since flux measurements (magnetograms) cannot by themselves distinguish between filling‐factor and field‐strength effects. The first real determinations of intrinsically weak (less than kG) fields have in fact been made only this year, using the Stokes V profiles of an infrared line pair near 1.56 μm. Many cases of discrete magnetic elements with field strengths as low as 0.4 kG have been found, immediately adjacent (within a couple of arcsec) to the normal strong‐field fluxtubes that have strengths in the range 1.4–1.6 kG and a magnetic polarity that can be both the same or opposite to that of the adjacent magnetic component.There appears to be a continuous sequence of bipolar magnetic regions of various scales, down to the spatial resolution limit, from active regions to ephemeral regions and inner‐network fields. It seems likely that this sequence continues in the form of a subarcsec mixed‐polarity or ‘‘turbulent’’ field that permeates the 9...

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
5
Average
Average
Average
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