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An Empirical Model of the Variation of the Solar Lyman-α Spectral Irradiance

Kretzschmar, Matthieu; Curdt, Werner; Snow, Martin

We propose a simple model that computes the spectral profile of the solar irradiance in the hydrogen Lyman alpha line, H Ly-α (121.567 nm), from 1947 to present. Such a model is relevant for the study of many astronomical environments, from planetary atmospheres to interplanetary medium. This empirical model is based on the SOlar Heliospheric Obse…