Time-dependent Hinode/EIS Atlas of a Coronal Mass Ejection Containing Cool Material

We report the first time-dependent spectral atlas of a coronal mass ejection (CME) observed by the Hinode/Extreme Ultraviolet Imaging Spectrometer (EIS). EIS observed the Cartwheel CME on 2008 April 9 at 09:30–10:00 UT in its full wavelength range and captured the bright core containing prominence m...

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Bibliographic Details
Published in:The Astrophysical journal 2024-08, Vol.970 (2), p.182
Main Authors: Wraback, E. M., Landi, E., Manchester, W. B.
Format: Article
Language:English
Subjects:
Corona
Coronal mass ejection
Emission measurements
Evolution
Imaging spectrometers
Prominences
Solar corona
Solar coronal mass ejections
Solar extreme ultraviolet emission
Solar Orbiter (ESA)
Solar orbits
Spectra
Spectrometers
Time dependence
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Summary:We report the first time-dependent spectral atlas of a coronal mass ejection (CME) observed by the Hinode/Extreme Ultraviolet Imaging Spectrometer (EIS). EIS observed the Cartwheel CME on 2008 April 9 at 09:30–10:00 UT in its full wavelength range and captured the bright core containing prominence material as it passed across the slit field of view. The measurement of the differential emission measure (DEM) showed that the observation captured two plasma components, a coronal component at Log T ≈ 6.05 K and a cold component at Log T ≈ 5.30 K, which we interpret as the prominence material in the CME core. We used this DEM to develop a spectral atlas for the four EIS spectra containing the CME material and the pre- and postevent spectra. These observations provide the basis for studying CME plasma evolution in the low solar corona, as well as guide observations from the current and upcoming spectrometers, including Solar Orbiter/SPICE, Solar-C/EUVST, and MUSE, which will advance our understanding of CME plasma evolution.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/ad625f