作为基本太阳叠加的EUV太阳
The EUV Sun as the superposition of elementary Suns
摘要：
许多研究假设EUV中的太阳辐照度可以分解为不同的贡献，这使得光谱变化的建模变得相当容易。我们考虑一种不同的方法，在这种方法中，这些贡献不是先验的，而是从光谱辐照度测量中有效和鲁棒地推断出来的。这是一个具有正性约束的源分离问题，我们使用贝叶斯解决方案。利用TIMED/SEE卫星连续5年记录的极紫外光谱数据，我们发现光谱辐照度可以分解为3个基本光谱。我们的研究结果表明，它们描述了太阳大气的不同层，而不是特定的区域。这些光谱的时间变化进行了讨论。
英文摘要：
Many studies assume that the solar irradiance in the EUV can be decomposed into different contributions, which makes the modelling of the spectral variability considerably easier. We consider a different approach, in which these contributions are not imposed a priori but are effectively and robustly inferred from spectral irradiance measurements. This is a source separation problem with a positivity constraint, for which we use a Bayesian solution. Using five years of daily EUV spectra recorded by the TIMED/SEE satellite, we show that the spectral irradiance can be decomposed into three elementary spectra. Our results suggest that they describe different layers of the solar atmosphere rather than specific regions. The temporal variability of these spectra is discussed.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
