Radiative Hydrodynamic Simulations of the Spectral Characteristics of Solar White-light Flares
arXiv:2007.08850 · doi:10.1088/1674-4527/21/1/1
Abstract
As one of the most violent activities in the solar atmosphere, white-light flares (WLFs) are generally known for their enhanced white-light (or continuum) emission, which primarily originates in the solar lower atmosphere. However, we know little about how white-light emission is produced. In this study, we aim to investigate the response of the continua at 3600Å and 4250Å and also the H and Ly lines during WLFs modeled with radiative hydrodynamics simulations. We take non-thermal electron beams as the energy source for the WLFs in two different initial atmospheres and vary their parameters. Our results show that the model with non-thermal electron beam heating can clearly show enhancements in the continua at 3600Å and 4250Å as well as in the H and Ly lines. A larger electron beam flux, a smaller spectral index, or a penumbral initial atmosphere leads to a stronger emission increase at 3600Å, 4250Å and in the H line. For the Ly line, however, it is more preferably enhanced in a quiet-Sun initial atmosphere with a larger spectral index of the electron beam. It is also notable that the continua at 3600Å and 4250Å and the H line exhibit a dimming at the beginning of the heating and reach their peak emissions later than the peak time of the heating function, while the Ly line does not show such behaviors. These results can be served as a reference for analyzing future WLF observations.
arXiv comment21 pages, 10figures, 1 table, accepted for publication in RAA
References in corpus (32)
- Impulsive phase flare energy transport by large-scale Alfven waves and the electron acceleration problem
- Radiative Hydrodynamic Models of the Optical and Ultraviolet Emission from Solar Flares
- Does a Non-Magnetic Solar Chromosphere Exist?
- Dynamic Hydrogen Ionization
- A Unified Computational Model for Solar and Stellar Flares
- CHIANTI - an atomic database for emission lines - Paper XV: Version 9, improvements for the X-ray satellite lines
- Hot Spine Loops and the Nature of a Late-Phase Solar Flare
- RH 1.5D: a massively parallel code for multi-level radiative transfer with partial frequency redistribution and Zeeman polarisation
- Radiative Hydrodynamic Models of Optical and Ultraviolet Emission from M Dwarf Flares
- Do all Flares have White Light Emission?
- Halpha line profile asymmetries and the chromospheric flare velocity field
- New Insights into White-Light Flare Emission from Radiative-Hydrodynamic Modeling of a Chromospheric Condensation
- Flare Ribbons Observed with G-band and FeI 6302A Filters of the Solar Optical Telescope on Board Hinode
- Hydrogen Balmer Line Broadening in Solar and Stellar Flares
- Correlation of hard X-ray and white light emission in solar flares
- G-band and Hard X-ray Emissions of the 2006 December 14 flare observed by Hinode/SOT and RHESSI
- A New Multi-wavelength Solar Telescope: Optical and Near-infrared Solar Eruption Tracer (ONSET)
- A Circular White-Light Flare with Impulsive and Gradual White-Light Kernels
- Footpoint Motion of the Continuum Emission in the 2002 September 30 White-Light Flare
- IRIS, Hinode, SDO, and RHESSI observations of a white light flare produced directly by non-thermal electrons
- On the Relationship between the Continuum Enhancement and Hard X-ray Emission in a White-Light Flare
- Characteristics that Produce White-Light Enhancements in Solar Flares Observed by Hinode/SOT
- Reproducing Type II White-Light Solar Flare Observations with Electron and Proton Beam Simulations
- Observations of a white-light flare associated with a filament eruption
- Modelling Mg II During Solar Flares. I. Partial Frequency Redistribution, Opacity, and Coronal Irradiation
- Non-LTE Calculations of the Fe I 6173 Å Line in a Flaring Atmosphere
- RADYN simulations of non-thermal and thermal models of Ellerman bombs
- Efficient Calculation of Non-Local Thermodynamic Equilibrium Effects in Multithreaded Hydrodynamic Simulations of Solar Flares
- Modeling Mg II during Solar Flares. II. Non-equilibrium Effects
- The Response of the Lyman-Alpha Line in Different Flare Heating Models
- Simulating Solar Flare Irradiance with Multithreaded Models of Flare Arcades
- Hydrogen Emission in Type II White-light Solar Flares