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January 23, 2026

Thermodynamic and magnetic evolution of an eruptive C-class solar flare observed with SST/TRIPPEL-SP

C.J. Díaz Baso J. de la Cruz Rodríguez H.-P. Doerr M. van Noort A. Prasad A. Feller D. Kiselman

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Key Points

To understand the thermodynamic and magnetic evolution during a C5.1-class solar flare and filament eruption in active region NOAA 12561.
High spatial and spectral resolution observations of Ca ii 8542,Å line and photospheric lines using TRIPPEL-SP spectropolarimeter.
Nonlocal thermodynamic equilibrium (NLTE) inversions for analyzing thermodynamic properties.
Non-force-free field (NFFF) magnetic extrapolations to study magnetic topology.
Assessment of atmospheric response during the rise, peak, and decay phases of the flare.
Eruption speed of the filament exceeded ∼70 ms during the flare's rise phase.
Free energy decreased by ∼30% following the eruption as post-flare loops formed.
Flare ribbons heated to ∼8500 K with observed downflows up to ∼10 ms in reconnected loops.
Persistent localized heating of ∼2000 K detected before the eruption, indicating strong downflows.

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Implication

Investigative analysis reveals thermodynamic and magnetic changes during a C-class solar flare, indicating eruption behaviors.

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Cite This Study

Baso et al. (2026) studied this question.

synapsesocial.com/papers/697854bcccb046adae516f3f https://doi.org/10.1051/0004-6361/202557756/pdf

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