Integral field spectroscopy of Na I D1/D2 lines reveals standing ~5.5 mHz oscillations at a sunspot umbral center indicating resonance-cavity dynamics, with propagating modes and damping at the boundary.
B., Bjelksjo, K., Korhonen, T
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A multi-height extrapolation framework using chromospheric vector data recovers a pre-eruptive flux-rope configuration in an observed solar filament, outperforming photosphere-only models in simulation tests.
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Standing oscillations in a resonant sunspot atmosphere captured by integral field spectroscopy
Integral field spectroscopy of Na I D1/D2 lines reveals standing ~5.5 mHz oscillations at a sunspot umbral center indicating resonance-cavity dynamics, with propagating modes and damping at the boundary.
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Chromospheric magnetic field extrapolations reveal the flux-rope configuration of a solar filament
A multi-height extrapolation framework using chromospheric vector data recovers a pre-eruptive flux-rope configuration in an observed solar filament, outperforming photosphere-only models in simulation tests.