Sunspot Magnetic Fields Observed with a Large-Format Infrared Array

Details Sunspot Magnetic Fields Observed with a Large-Format Infrared Array Sunspot Magnetic Fields Observed with a Large-Format Infrared Array

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001pasj...53..923s&link_type=abstract

Publications of the Astronomical Society of Japan, Vol.53, No. 5, pp. 923-930

Astronomy and Astrophysics

Astronomy

1

Instrumentation: Detectors, Line: Profiles, Polarization, Sun: Magnetic Fields, Sun: Sunspots

Scientific paper

Spectro-polarimetric observations of sunspots were carried out by using a PtSi near-infrared camera (KONIC) of Kiso Observatory, The University of Tokyo, in the period of 1999 November 3-5. The camera was attached to a spectrograph of the Domeless Solar Telescope at Hida Observatory, Kyoto University. We observed the absorption lines of FeI at 15648.5Å (Lande factor gL = 1.53) and 15652.9Å (gL eff = 3), and derived the distribution of the magnetic field strengths and inclination angles across the sunspots. The ratio of the Zeeman splitting of the two lines was derived to be 0.39 +/- 0.01, while the ratio of the Lande factors is 0.51. Our data indicates that the effective Lande factor of the 15652.9Å line is 1.17 +/- 0.03..

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