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Evidence of chromospheric molecular hydrogen emission in a solar flare observed by the IRIS satellite
Fletcher, Lyndsay; Mulay, Sargam M.
We have carried out the first comprehensive investigation of enhanced line emission from molecular hydrogen, H2 at 1333.79 Å, observed at flare ribbons in SOL2014-04-18T13:03. The cool H2 emission is known to be fluorescently excited by Si IV 1402.77 Å UV radiation and provides a unique view of the temperature minimum region …
Diagnostics of homologous solar-surge plasma as observed by IRIS and SDO
Kayshap, Pradeep; Tripathi, Sharad C.; Singh Payal, Rajdeep +1 more
Surges have regularly been observed in mostly H α 6563 Å and Ca II 8542 Å. However, surge responses to other prominent lines of the interface region (Mg II k 2796.35 Å and h 2803.52 Å, O IV 1401.15 Å, Si IV 1402.77 Å) are not well studied. Here, the evolution and kinematics of six homologous surges are analysed using IRIS and AIA observations. The…