A chromospheric conundrum?

We examine spectra of the Ca II H line, obtained under good seeing conditions with the VTT Echelle Spectrograph in 2007 June, and higher resolution data of the Ca II λ8542 line...我们针对2007年6月采用真空塔式望远镜（VTT）埃歇尔光谱仪（Echelle Spectrograph）在良好视宁度条件下获取的钙II H谱线（Ca II H line）光谱，以及钙II λ8542谱线（Ca II λ8542 line）的高分辨率数据开展了观测研究。