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A Single Power Law for the TRAPPIST-1 Flare Distribution across 4 Orders of Magnitude in Energy

  • Authors: Valeriy Vasilyev, Alexander I. Shapiro, Nadiia Kostogryz, Chia-Lung Lin, Greg Kopp, Benjamin V. Rackham, Astrid M. Veronig, Olivia Lim, Julien de Wit, Daniel Apai, Laurent Gizon, Sami K. Solanki, Sara Seager

Valeriy Vasilyev et al 2026 The Astrophysical Journal Letters 1004 .

  • Provider: AAS Journals

Caption: Figure 7.

Impact of the assumed flare temperature on the cumulative FFD. Colored markers show the K2 cumulative FFD recomputed for different assumed flare temperatures, and dashed lines show power-law fits to the high-energy regime. For a fixed observed flux enhancement, a higher ﹩{T}_{{\rm{flare}}}﹩ implies a smaller inferred TESS-band flare energy, shifting the K2-based FFD to lower ETESS. In particular, adopting a solar-like white-light temperature (﹩{T}_{{\rm{flare}}}\sim 9000﹩ K) shifts the K2 FFD sufficiently that its extrapolation becomes inconsistent with the FFD from JWST observations.

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