Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...263..312s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 263, no. 1-2, p. 312-322.
Astronomy and Astrophysics
Astrophysics
70
Infrared Spectra, Solar Magnetic Field, Field Strength, Magnetic Field Configurations, Radiative Transfer, Solar Atmosphere, Stellar Models, Zeeman Effect
Scientific paper
The properties of two Fe I lines at 15648.5 A and 15652.9 A in the infrared H-band are investigated using numerical radiative transfer calculations. It is shown that using this combination of a Lande g = 3 and a g(eff) = 1.53 line it is possible to measure the field strength in solar magnetic features simply and with great accuracy. The g = 3 line alone allows field strengths as low as 300-600 G to be measured. By forming the line ratio between the V profiles of these lines it is, in principle, possible to measure field strengths as low as 100 G, thus achieving a sensitivity otherwise only possible with the emission lines near 12 microns. Other diagnostic capabilities of these lines are also analyzed.
Livingston Willam
Rueedi I. K.
Solanki Sami K.
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