We re-examine the XUV luminosity evolution of TRAPPIST-1 utilizing new observational constraints (XUV and bolometric luminosity) from multi-epoch X-ray/UV photometry. Following the formalism presented in Fleming et al., we infer that TRAPPIST-1 maintained a saturated XUV luminosity, relative to the bolometric luminosity, of log₁₀(L _XUV/L _bol) at early times for a period of t _sat Gyr. After the saturation phase, we find L _XUV decayed over time by an exponential rate of β _XUV . Compared to our inferred age of the system, Gyr, our result for t _sat suggests that there is only a ∼4% chance that TRAPPIST-1 still remains in the saturated phase today, which is significantly lower than the previous estimate of 40%. Despite this reduction in t _sat, our results remain consistent in the conclusion that the TRAPPIST-1 planets likely received an extreme amount XUV energy—an estimated integrated XUV energy of ∼10³⁰–10³² erg over the star’s lifetime.

我们利用来自多纪元 X 射线/紫外光度法的新观测约束（XUV 和辐射光度）重新检查了 TRAPPIST-1 的 XUV 光度演变。根据 Fleming 等人提出的形式主义，我们推断 TRAPPIST-1在早期t _sat Gyr的时间段内保持饱和 XUV 光度（相对于辐射热光度）为 log ₁₀ ( L _XUV / L _bol ) 。在饱和阶段之后，我们发现L _XUV随着时间的推移以β _XUV的指数速率衰减。与我们推断的系统年龄Gyr 相比，我们对t _sat的结果 表明 TRAPPIST-1 今天仍然处于饱和阶段的可能性只有 4%，这明显低于之前估计的 40%。尽管t _sat有所降低，但我们的结果仍然一致地得出结论，即 TRAPPIST-1 行星可能接收到极高量的 XUV 能量——在恒星的生命周期内估计的综合 XUV 能量约为10 ³⁰ –10 ^{32 erg。}