Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 691, Issue 2, Pages L99-L102Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/691/2/L99
Keywords
Sun: corona; Sun: flares
Categories
Funding
- JAXA
- NAOJ
- STFC
- NASA
- ESA
- NSC
- Science and Technology Facilities Council [PP/E001173/1] Funding Source: researchfish
- STFC [PP/E001173/1] Funding Source: UKRI
Ask authors/readers for more resources
We explore the pre-flare behavior of the corona in a three-day period building up to an X-class flare on 2006 December 13 by analyzing EUV spectral profiles from the Hinode EUV Imaging Spectrometer (EIS) instrument. We found an increase in the coronal spectral line widths, beginning after the time of saturation of the injected helicity as measured by Magara & Tsuneta. In addition, this increase in line widths (indicating nonthermal motions) starts before any eruptive activity occurs. The Hinode EIS has the sensitivity to measure changes in the buildup to a flare many hours before the flare begins.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available