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

作者：Kretzschmar Matthieu^*; Snow Martin; Curdt Werner

来源：Geophysical Research Letters, 2018, 45(5): 2138-2144.

DOI：10.1002/2017GL076318

• solar irradiance
• solar variability

We propose a simple model that computes the spectral profile of the solar irradiance in the hydrogen Lyman alpha line, H Ly-alpha (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 Observatory/Solar Ultraviolet Measurement of Emitted Radiation observations of the Ly-alpha irradiance over solar cycle 23 and the Ly-alpha disk-integrated irradiance composite. The model reproduces the temporal variability of the spectral profile and matches the independent SOlar Radiation and Climate Experiment/SOLar-STellar Irradiance Comparison Experiment spectral observations from 2003 to 2007 with an accuracy better than 10%.

• 出版日期2018-3-16