Energy Partition in Four Confined Circular-Ribbon Flares
arXiv:2102.09819 · doi:10.1007/s11207-021-01805-5
Abstract
In this study, we investigated the energy partition of four confined circular-ribbon flares (CRFs) near the solar disk center, which are observed simultaneously by SDO, GOES, and RHESSI. We calculated different energy components, including the radiative outputs in 18, 170, and 70370 Å, total radiative loss, peak thermal energy derived from GOES and RHESSI, nonthermal energy in flare-accelerated electrons, and magnetic free energy before flares. It is found that the energy components increase systematically with the flare class, indicating that more energies are involved in larger flares. The magnetic free energies are larger than the nonthermal energies and radiative outputs of flares, which is consistent with the magnetic nature of flares. The ratio of the four flares, being 0.700.76, is considerably higher than that of eruptive flares. Hence, this ratio may serve as an important factor that discriminates confined and eruptive flares. The nonthermal energies are sufficient to provide the heating requirements including the peak thermal energy and radiative loss. Our findings impose constraint on theoretical models of confined CRFs and have potential implication for the space weather forecast.
20 pages, 14 figures, accepted for publication in Solar Physics, comments are welcome
References in corpus (28)
- Preprocessing of vector magnetograph data for a non-linear force-free magnetic field reconstruction
- CHIANTI - an atomic database for emission lines - Paper XV: Version 9, improvements for the X-ray satellite lines
- Why Is the Great Solar Active Region 12192 Flare-Rich But CME-Poor?
- Global Energetics of Solar Flares: V. Energy Closure in Flares and Coronal Mass Ejections
- The Confined X-class Flares of Solar Active Region 2192
- Decoding the Pre-Eruptive Magnetic Field Configurations of Coronal Mass Ejections
- The Radiated Energy Budget of Chromospheric Plasma in a Major Solar Flare Deduced From Multi-Wavelength Observations
- Global Energetics of Solar Flares: I. Magnetic Energies
- Magnetic Structure and Dynamics of the Erupting Solar Polar Crown Prominence on 2012 March 12
- Multiwavelength observations of a partially eruptive filament on 2011 September 8
- Chromospheric Condensation and Quasi-periodic Pulsations in a Circular-ribbon Flare
- Can We Improve the Preprocessing of Photospheric Vector Magnetograms by the Inclusion of Chromospheric Observations?
- Thermal-nonthermal energy partition in solar flares derived from X-ray, EUV, and bolometric observations
- An Unorthodox X-Class Long-Duration Confined Flare
- Triggering mechanism and material transfer of a failed solar filament eruption
- Magnetohydrodynamic Simulation of Magnetic Null-point Reconnections and Coronal dimmings during the X2.1 flare in NOAA AR 11283
- Investigating the differential emission measure and energetics of microflares with combined SDO/AIA and RHESSI observations
- Large-scale contraction and subsequent disruption of coronal loops during various phases of the M6.2 flare associated with the confined flux rope eruption
- Generation mechanisms of quasi-parallel and quasi-circular flare ribbons in a confined flare
- An Eruptive Circular-ribbon Flare with Extended Remote Brightenings
- Imaging and spectral study on the null point of a fan-spine structure during a solar flare
- Development of a Confined Circular-cum-parallel Ribbon Flare and Associated Pre-flare Activity
- Evolutionary stages and triggering process of a complex eruptive flare with circular and parallel ribbons
- The origin of quasi-periodicities during circular ribbon flares
- Transverse oscillation of a coronal loop induced by a flare-related jet
- Impulsive energy release and non-thermal emission in a confined M4.0 flare triggered by rapidly evolving magnetic structures
- Fast degradation of the circular flare ribbon on 2014 August 24
- A Solar Magnetic-fan Flaring Arch Heated by Non-thermal Particles and Hot Plasma from an X-ray Jet Eruption