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Solar extreme ultraviolet (EUV) flare observations and findings from the Solar Dynamics Observatory (SDO) EUV Variability Experiment (EVE)

Published online by Cambridge University Press:  09 September 2016

Thomas N. Woods ,
Francis G. Eparvier  and
James P. Mason
Thomas N. Woods
Affiliation:
Laboratory for Atmospheric and Space Physics, University of Colorado, 3665 Discovery Drive, Boulder, CO 80303, USA email: tom.woods@lasp.colorado.edu, frank.eparvier@colorado.edu, james.mason@lasp.colorado.edu
Francis G. Eparvier
Affiliation:
Laboratory for Atmospheric and Space Physics, University of Colorado, 3665 Discovery Drive, Boulder, CO 80303, USA email: tom.woods@lasp.colorado.edu, frank.eparvier@colorado.edu, james.mason@lasp.colorado.edu
James P. Mason
Affiliation:
Laboratory for Atmospheric and Space Physics, University of Colorado, 3665 Discovery Drive, Boulder, CO 80303, USA email: tom.woods@lasp.colorado.edu, frank.eparvier@colorado.edu, james.mason@lasp.colorado.edu
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Abstract

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New solar soft X-ray (SXR) and extreme ultraviolet (EUV) irradiance observations from NASA Solar Dynamics Observatory (SDO) EUV Variability Experiment (EVE) provide full coverage from 0.1 to 106 nm and continuously at a cadence of 10 seconds for spectra at 0.1 nm resolution. These observations during flares can usually be decomposed into four distinct characteristics: impulsive phase, gradual phase, coronal dimming, and EUV late phase. Over 6000 flares have been observed during the SDO mission; some flares show all four phases, and some only show the gradual phase. The focus is on the newer results about the EUV late phase and coronal dimming and its relationship to coronal mass ejections (CMEs). These EVE flare measurements are based on observing the sun-as-a-star, so these results could exemplify stellar flares. Of particular interest is that new coronal dimming measurements of stars could be used to estimate mass and velocity of stellar CMEs.

Keywords

Irradiancesolar flaressoft X-rayextreme ultraviolet
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S320: Solar and Stellar Flares and their Effects on Planets , August 2015 , pp. 27 - 40
Copyright
Copyright © International Astronomical Union 2016 

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