Flare Ribbon Expansion and Energy Release Rate
- 10 August 2004
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 611 (1), 557-567
- https://doi.org/10.1086/422159
Abstract
We have examined the relation between the evolution of the Hα flare ribbons and the released magnetic energy in a solar flare that occurred on 2001 April 10. Based on the magnetic reconnection model, the released energy was quantitatively calculated by using the photospheric magnetic field strengths and separation speeds of the fronts of the Hα flare ribbons. We compared the variation of the released energy with the temporal and spatial fluctuations in the nonthermal radiation observed in hard X-rays and microwaves. These nonthermal radiation sources indicate when and where large energy releases occur. We also estimated the magnetic energy released during the flare. The estimated energy release rates in the Hα kernels associated with the hard X-ray sources are locally large enough to explain the difference between the spatial distributions of the Hα kernels and the hard X-ray sources. We also reconstructed the peaks in the nonthermal emission by using the estimated energy release rates.Keywords
This publication has 35 references indexed in Scilit:
- Evolution of Conjugate Footpoints inside Flare Ribbons during a Great Two‐Ribbon Flare on 2001 April 10The Astrophysical Journal, 2003
- Difference between Spatial Distributions of the Hα Kernels and Hard X-Ray Sources in a Solar FlareThe Astrophysical Journal, 2002
- Eruption of a Flux Rope on the Disk of the Sun: Evidence for the Coronal Mass Ejection Trigger?The Astrophysical Journal, 2001
- The Magnetic Structure and Generation of EUV Flare RibbonsSolar Physics, 2001
- What can we learn about reconnection from coronal mass ejections?Journal of Atmospheric and Solar-Terrestrial Physics, 2000
- The SOHO mission: An overviewSolar Physics, 1995
- Solar flares, microflares, nanoflares, and coronal heatingSolar Physics, 1991
- The H-alpha spectral signatures of solar flare nonthermal electrons, conductive flux, and coronal pressureThe Astrophysical Journal, 1984
- Theoretical model of flares and prominencesSolar Physics, 1974
- The deduction of energy spectra of non-thermal electrons in flares from the observed dynamic spectra of hard X-ray burstsSolar Physics, 1971