Comparative development of Na I line profiles: left: 5889.95 Å; middle: 6154.222 Å; right: 6160.75 Å, for JD 55 314, 55 334, 55 370, and 55 378. The emission at around 0 km s-1 and the additional absorption at around − 100 km s-1 were not observed on the higher excitation lines.
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