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The EUV spectral irradiance of the Sun from 1997 to date
Del Zanna, Giulio; Andretta, Vincenzo
AA(Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, UK ), AB(INAF - Osservatorio Astronomico di Capodimonte, Salita Moiariello, 16, I-80131, Napoli, Italy )
Solar and Stellar Variability: Impact on Earth and Planets, Proceedings of the International Astronomical Union, IAU Symposium, Volume 264, p. 78-80
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Sun: UV radiation, Sun: activity, solar-terrestrial relations
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We present measurements of the EUV spectral irradiance we have obtained from radiance measurements with the SOHO Coronal Diagnostic Spectrometer, from 1997 to date. We discuss the contribution of the various regions of the Sun to the total EUV irradiance, and how they varied dramatically between the last two solar minima. These observations allow us to interpret spectral irradiance measurements in the EUV which have been available since 2002 with the TIMED mission. We also briefly discuss how changes in various activity indices compare with the EUV spectral variability, and the limitations of spectral modelling.

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Database: Astronomy
arXiv e-prints