On the ratios of \ion{Si}{4} lines ($\lambda$1394/$\lambda$1403) in an emerging flux region

Durgesh Tripathi, V. N. Nived, Hiroaki Isobe +1

The resonance lines of \ion{Si}{4} formed at $\lambda$1394 and 1403 Å are the most critical for the diagnostics of the solar transition region in the observations of the Interface Region…