Title: Fast inversion of solar Ca II spectra Show Chinese title

Title: 快速反演太阳钙Ⅱ谱线

Abstract: We present a fast (<< 1 s per profile) inversion code for solar Ca II lines. The code uses an archive of spectra that are synthesized prior to the inversion under the assumption of local thermodynamic equilibrium (LTE). We show that it can be successfully applied to spectrograph data or more sparsely sampled spectra from two-dimensional spectrometers. From a comparison to a non-LTE inversion of the same set of spectra, we derive a first-order non-LTE correction to the temperature stratifications derived in the LTE approach. The correction factor is close to unity up to log tau ~ -3 and increases to values of 2.5 and 4 at log tau = -6 in the quiet Sun and the umbra, respectively. Show Chinese abstract

Abstract: 我们提出了一种快速（每谱线 << 1 秒）的太阳 Ca II 线反演代码。该代码使用一个光谱档案，这些光谱是在假设局部热动平衡（LTE）条件下预先合成的。我们表明它可以成功应用于光谱仪数据或来自二维分光仪的更稀疏采样的光谱。通过与相同光谱集的非 LTE 反演比较，我们得出了 LTE 方法中推导出的温度分层的首阶非 LTE 校正。校正因子在 log tau ~ -3 以下接近于 1，并且在日冕和本影中分别增加到 log tau = -6 时的 2.5 和 4。