Measurement of the full Stokes vector of He I 10830 Å |
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| Authors: | I Rüedi C U Keller S K Solanki |
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| Institution: | (1) Institute of Astronomy, ETH Zentrum, CH-8092 Zürich, Switzerland;(2) National Solar Observatory, NOAO, P.O.Box 26732, 85726 Tucson, AZ, USA;(3) Institute of Astronomy, ETH Zentrum, CH-8092 Zürich, Switzerland |
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| Abstract: | First observations of the full Stokes vector in the upper chromosphere are presented. The He I 10830 Å line, which has been shown to give reliable measurements of the line-of-sight component of the magnetic field vector, has been used for this purpose. It is shown that the difference between the appearance of chromospheric and photospheric magnetic structures observed close to the solar limb is largely due to the difference in height to which they refer and projection effects. The observations do suggest, however, that the magnetic field above sunspot penumbrae is somewhat more vertical in the chromosphere than in the photosphere.The National Optical Astronomy Obervatories are operated by the Association of Universities for Research in Astronomy, Inc. (AURA) under cooperative agreement with the National Science Foundation |
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| Keywords: | Chromosphere Polarization Infrared Magnetic Field |
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