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Record 52 of 44799
Magnetic field and electric current structure in the chromosphere
External Online Source: doi:10.1007/BF00152492
Author and Affiliation:
Dravins, D.
Abstract: The three-dimensional vector magnetic field structure in the chromosphere above an active region is deduced by using high-resolution H-alpha filtergrams together with a simultaneous digital magnetogram. An analog model of the field is made with 400 metal wires representing field lines that outline the H-alpha structure. The height extent of the field is determined from vertical field-gradient observations around sunspots, from observed fibril heights, and from an assumption that the sources of the field are largely local. The computed electric currents (typically 10 mA/sq m) are found to flow in patterns not similar to observed features and not parallel to magnetic fields. Force structures correspond to observed solar features; the dynamics to be expected include: downward motion in bipolar areas in the lower chromosphere, an outflow of the outer chromosphere into the corona with radially outward flow above bipolar plage regions, and motion of arch filament systems.
Publication Date: Aug 01, 1974
Document ID:
19750027833
(Acquired Dec 01, 1995)
Accession Number: 75A11905
Subject Category: SOLAR PHYSICS
Document Type: Journal Article
Publication Information: Solar Physics; 37; Aug. 197
Publisher Information: Netherlands
Contract/Grant/Task Num: NSF GA-24015; NGR-05-002-034
Financial Sponsor: NASA; United States
Description: 20p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ASTRONOMICAL MODELS; CHROMOSPHERE; CURRENT DISTRIBUTION; H ALPHA LINE; MAGNETIC FIELD CONFIGURATIONS; SOLAR MAGNETIC FIELD; ANALOG SIMULATION; ELECTROMAGNETIC SPECTRA; ERROR ANALYSIS; FILTERGRAMS; LORENTZ FORCE; MAGNETIC FLUX; MAGNETIC SIGNATURES; SOLAR SPECTRA; VECTOR ANALYSIS; VERTICAL DISTRIBUTION
Imprint And Other Notes: Solar Physics, vol. 37, Aug. 1974, p. 323-342.
Miscellaneous Notes: p. 323-342
Availability Source: Other Sources
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