Effect of the H I Lyα Chromospheric Flux Anisotropy on the Total Intensity of the Resonantly Scattered Coronal Radiation
作者： F. Auchere
DOI: 10.1086/427903
关键词:
摘要: In modeling of the resonantly scattered solar coronal Lyα line H I, intensity chromospheric source is often assumed to be uniform. We investigate validity this assumption. After establishing a correlation between I 121.6 nm and He II 30.4 intensities, we build Carrington maps chromosphere from SOHO EUV Imaging Telescope data. These are used compute irradiance throughout corona heliosphere. A 15% latitudinal anisotropy found at 1 AU minimum, value becomes larger closer Sun. The effect flux on total radiation quantified. find that uniform-disk assumption leads systematic overestimates polar regions by average. evolution with activity case other lines discussed.
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harvard.edu
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