Shanmugapriya, G; Karthikeyan, B; Rajamanickam, N; Bagare, S. P
(Springer, 2022-09)
A high-resolution sunspot umbra spectrum recorded in National Solar Observatory, Kitt Peak, in the visible and infrared wave number range was used to search the rotational lines of A 1Π–X 1Σ+ (0,0), (0,0), (1,0), (1,1), ...