Comparison of 30 THz Impulsive burst time development to microwaves, H, EUV, and GOES soft X-ray

CABEZAS,D.; FREELAND, S.; KUDAKA, A.S.; RAULIN, J.-P; MITEVA,ROSITSA; CASSIANO, M.M.; KARLICKÝ, M.; LUONI, M.L.; TROTTET, G.; KAUFMANN, P.; FERNANDES, L.O.T.; KERDRAON, A; MARCON, R.; WHITE, S. M.

ASTRONOMY & ASTROPHYSICS. SUPPLEMENT SERIES (PRINT)

EDP Sciences

Año: 2016 vol. 586

0365-0138

The recent discovery of impulsive solar burst emission in the 30 THz band is raising new interpretation challenges. One event associated with a GOES M2class flare has been observed simultaneously in microwaves, H-alpha, EUV, and soft X-ray bands. Although these new observations confirm some features found in the two prior known events, they exhibit time profile structure discrepancies between 30 THz, microwaves, and hard X-rays (as inferred from the Neupert effect). These results suggest a more complex relationship between 30THz emission and radiation produced at other wavelength ranges. The multiple frequency emissions in the impulsive phase are likely to be produced at a common flaring site lower in the chromosphere. The 30 THz burst emission may be either part of a nonthermal radiation mechanism or due to the rapid thermal response to a beam of high-energy particles bombarding the dense solar atmosphere.