Unfolding Overlapping Spectral Images to Determine the Plasma Velocity During a Solar Flare
Abstract
Spectroscopic images of the Sun can provide temperature and velocity information when monitoring and detecting solar flares. Solar Flares and the associated Coronal Mass Ejections (CMEs) can send fast moving charged particles directly into the path of Earth and impact space-borne instrumentation and astronauts. Strong CMEs can affect power grids on the surface of Earth. Therefore, there is significant interest and research is being conducted to try to predict these events.
As most spectrometers have a comparatively small slit width to avoid overlapping spectral images, their field of view is limited and scanning slit spectrometers often miss rapidly evolving events such as flares. Slot spectrometers measure both the imaging and spectral information over a much larger field of view. However, in these "overlappogram" images, the spectral and spatial information is convolved, making the data difficult to interpret. Recently, a method to unfold slitless spectrometer data was developed for the COronal Spectroscopic Imager in the EUV (COSIE) instrument. Building upon this research, Extreme-ultraviolet Imaging Spectrometer (EIS) and Atmospheric Imaging Assembly (AIA) data are used to determine the best spatial, temperature, and velocity parameters for the preflare data inversion, or unfolding. These parameters are then applied to the flare data inversion with the goal of determining the velocity of the plasma involved in a solar flare.- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFMSH31C3322T
- Keywords:
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- 7534 Radio emissions;
- SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY;
- 7549 Ultraviolet emissions;
- SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY;
- 7554 X-rays;
- gamma rays;
- and neutrinos;
- SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY;
- 7594 Instruments and techniques;
- SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY