Estimation of Key Sunquake Parameters through Hydrodynamic Modeling and Cross-Correlation Analysis
arXiv:1911.06839 · doi:10.3847/1538-4357/ab88ae
Abstract
Sunquakes are one of the more distinct secondary phenomena related to solar flares, where energy deposition in the lower layers of the Sun's atmosphere excites acoustic waves easily visible in Helioseismic and Magnetic Imager (HMI) dopplergrams. We explore two possible sources of sunquakes in the context of the electron beam hypothesis: an instantaneous transfer of momentum and a gradual applied force due to flare eruption. We model the sunquake excitation and compare with five observed sunquake events using a cross-correlation analysis. We find that at least half the events studied are consistent with the electron beam hypothesis and estimate the energy required to excite the sunquakes to be within the range determined by previous studies.
References in corpus (12)
- A Model for Solar Coronal Mass Ejections
- Helioseismology
- Global Properties of Solar Flares
- Global Forces in Eruptive Solar Flares: The Lorentz force Acting on the Solar Atmosphere and the Solar Interior
- Observables Processing for the Helioseismic and Magnetic Imager Instrument on the Solar Dynamics Observatory
- Properties of Flares-Generated Seismic Waves on the Sun
- Statistics of "Cold" Early Impulsive Solar Flares in X-ray and Microwave domains
- Investigation of Relationship Between High-Energy X-ray Sources and Photospheric and Helioseismic Impacts of X1.8 Solar Flare of October 23, 2012
- Sunquakes: helioseismic response to solar flares
- Viscosity effects on waves in partially and fully ionized plasma in magnetic field
- High-wavenumber solar -mode strengthening prior to active region formation
- Global Energetics of Solar Flares. IX. Refined Magnetic Modeling