Search for spectral line polarization in the solar vacuum ultraviolet |
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| Authors: | J. O. Stenflo D. Dravins N. Wihlborg A. Bruns V. K. Prokof'ev I. A. Zhitnik H. Biverot L. Stenmark |
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| Affiliation: | (1) High Altitude Observatory, National Center for Atmospheric Research, Boulder, Colo., U.S.A.;(2) Lund Observatory, S-22224 Lund, Sweden;(3) Crimean Astrophysical Observatory, 334413 Nauchny, U.S.S.R.;(4) Lebedev Institute of Physics, Leninskij Prospekt, 53 Moscow, U.S.S.R.;(5) Jungner Instrument AB, Fack, S-17120 Solna, Sweden;(6) Present address: Philips Elektronikindustrier AB, Fack, S-17520 Jarfälla, Sweden;(7) Swedish Space Corporation, Tritonvägen 27, S-17154 Solna, Sweden |
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| Abstract: | An instrument designed to record polarization in the region 120–150 nm of the solar spectrum was launched on the satellite Intercosmos-16, July 27, 1976. The aim was to search for resonance-line polarization that is caused by coherent scattering. Oblique reflections at gold- and aluminium-coated mirrors in the instrument were used to analyze the polarization. The average polarization of the L solar limb was found to be less than 1%. It is indicated how future improved VUV polarization measurements may be a diagnostic tool for chromospheric and coronal magnetic fields and for the three-dimensional geometry of the emitting structures.On leave from Lund Observatory, S-22224 Lund, Sweden.The National Center for Atmospheric Research is sponsored by the National Science Foundation. |
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