SPECTROSCOPIC OBSERVATIONS OF AN EVOLVING FLARE RIBBON SUBSTRUCTURE SUGGESTING ORIGIN IN CURRENT SHEET WAVES
Journal Article
·
· Astrophysical Journal
- Department of Physics, Montana State University, Bozeman, MT 59717 (United States)
We present imaging and spectroscopic observations from the Interface Region Imaging Spectrograph of the evolution of the flare ribbon in the SOL2014-04-18T13:03 M-class flare event, at high spatial resolution and time cadence. These observations reveal small-scale substructure within the ribbon, which manifests as coherent quasi-periodic oscillations in both position and Doppler velocities. We consider various alternative explanations for these oscillations, including modulation of chromospheric evaporation flows. Among these, we find the best support for some form of wave localized to the coronal current sheet, such as a tearing mode or Kelvin–Helmholtz instability.
- OSTI ID:
- 22525539
- Journal Information:
- Astrophysical Journal, Vol. 810, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
Similar Records
TEMPORAL EVOLUTION OF MULTIPLE EVAPORATING RIBBON SOURCES IN A SOLAR FLARE
Modeling a Propagating Sawtooth Flare Ribbon Structure as a Tearing Mode in the Presence of Velocity Shear
How important are electron beams in driving chromospheric evaporation in the 2014 March 29 flare?
Journal Article
·
Fri Jul 10 00:00:00 EDT 2015
· Astrophysical Journal Letters
·
OSTI ID:22525539
Modeling a Propagating Sawtooth Flare Ribbon Structure as a Tearing Mode in the Presence of Velocity Shear
Journal Article
·
Wed Sep 20 00:00:00 EDT 2017
· Astrophysical Journal
·
OSTI ID:22525539
How important are electron beams in driving chromospheric evaporation in the 2014 March 29 flare?
Journal Article
·
Tue Nov 10 00:00:00 EST 2015
· Astrophysical Journal
·
OSTI ID:22525539
+1 more