The Slowly Varying Corona: Findings from DEMs with the EVE MEGS-A Dataset; yes
Abstract
We present analysis of the complete spectral dataset from the Extreme-ultraviolet (EUV) Variability Experiment (EVE) MEGS-A instrument. Using these data, we construct daily differential emission measures (DEMs) and use them to analyze the long-term variability of the global corona and the irradiance it produces. We identify a discontinuity in the EUV irradiance and DEMs separating solar minimum and maximum conditions. Using the DEMs we also study the relationship between EUV and F10.7, the 10.7 cm (2.8 GHz) solar activity proxy. We compare predictions of the geoeffective F10.7 from the DEMs and photospheric magnetic field observations with the commonly used 81-day averaged F10.7 to investigate their uses in parameterizing the solar EUV irradiance.
- Publication:
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Solar Heliospheric and INterplanetary Environment (SHINE 2018)
- Pub Date:
- July 2018
- Bibcode:
- 2018shin.confE.252S