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Variation of the full Sun hydrogen Lyman α and β profiles with the activity cycle

TitleVariation of the full Sun hydrogen Lyman α and β profiles with the activity cycle
Publication TypeConference Paper
Year of Publication2002
AuthorsLemaire, P., Emerich C., Vial J.-C., Curdt W., Schühle U., and Wilhelm K.
EditorWilson, A.
Conference NameFrom Solar Min to Max: Half a Solar Cycle with SOHO
Date PublishedJun
Abstract

Full Sun hydrogen Lyman α and β profiles obtained through the activity cycle are needed to compare with stars, to understand the hydrogen distribution in the heliosphere and to evaluate the processes in the upper planetary atmospheres. Using the SUMER/SOHO telesocope scattered light properties, we have measured the Lyman α and β profiles at different epochs of the solar activity cycle. Here we report modifications in the intensity and the shape of the profiles.