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Spectral analysis of two solar twins and the colors of the Sun

Zhao, Gang; Zhao, ZhengShi; Chen, YuQin +1 more

High resolution (R∼40,000) and high signal-to-noise ratio (>150) spectra of two solar twins, HD146233 and HD195034, are obtained with the Coude Echelle Spectrograph at the 2.16 m telescope of the National Astronomical Observatories of Chinese Academy of Sciences (Xinglong, China). Based on the detailed spectrum match, comparisons of chemical co…