NDLI: Euv dimmings as a diagnostic of cmes and related phenomena

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Euv dimmings as a diagnostic of cmes and related phenomena

Content Provider	NASA Technical Reports Server (NTRS)
Author	West, Matthew J. Thompson, Barbara J. Mays, M. Leila Webb, David F.
Copyright Year	2012
Description	Large-scale coronal EUV dimmings, developing on timescaJes of minutes to hours in association with a flare or filament eruption, are known to exhibit a high correlation with coronal mass ejections. While most observations indicate that the decrease in emission in a dimming is due, at least in part, to a density decrease, a complete understanding requires us to examine at least four mechanisms that have been observed to cause darkened regions in the corona: 1) mass loss, 2) cooling, 3) heating, and 4) absorption/obscuration. Recent advances in automatic detection, observations with improved cadence and resolution, multi-viewpoint imaging, and spectroscopic studies have continued to shed light on dimming formation, evolution, and recovery. However, there are still some outstanding questions, including 1) Why do some CMEs show dimming and some do not? 2) What determines the location of a dimming? 3) What determines the temporal evolution of a dimming? 4) How does the post-eruption dimming connect to the ICME? 5) What is the relationship between dimmings and other CME-associated phenomena? The talk will emphasize the different formation mechanisms of dimmings and their relationship to CMEs and CME-associated phenomena.
File Size	372864
Page Count	1
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20120015865
Archival Resource Key	ark:/13960/t7fr4w34w
Language	English
Publisher Date	2012-01-01
Access Restriction	Open
Subject Keyword	Solar Physics Solar Corona Cooling Coronal Mass Ejection Absorption Heating Dimming Detection Extreme Ultraviolet Radiation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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