Infrared lines as probes of solar magnetic features. V - The magnetic structure of a simple sunspot and its canopy

Details Infrared lines as probes of solar magnetic features. V - The magnetic structure of a simple sunspot and its canopy Infrared lines as probes of solar magnetic features. V - The magnetic structure of a simple sunspot and its canopy

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...263..339s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 263, no. 1-2, p. 339-350.

Astronomy and Astrophysics

Astrophysics

83

Infrared Spectra, Magnetic Field Configurations, Solar Magnetic Field, Sunspots, Field Strength, Penumbras, Photosphere, Solar Atmosphere, Zeeman Effect

Scientific paper

The Zeeman Lande g = 3 Fe I line at 15648 A is used here to determine the strength and inclination of the magnetic field of a simple, relatively symmetric sunspot. The largest field strength observed in the sunspot is approximately 3100 G. The field strength at different points along the outer penumbral edge varies beween 800 and 1000 G. The angle of inclination at the outer penumbral boundary is close to 80 deg. A low-lying, almost horizontal superpenumbral magnetic canopy best reproduces the observations. The magnetic field strength in the canopy is consistent with a magnetic monopole. Evidence of small magnetic elements underlying the superpenumbral canopy is presented.

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