Comparison of 30 THz impulsive burst time development to microwaves, Hα, EUV, and GOES soft X-rays

Miteva R.; Kaufmann P.; Cabezas D.P.; Cassiano M.M.; Fernandes L.O.T.; Freeland S.L.; Karlicky M.; Kerdraon A.; Kudaka A.S.; Luoni M.L.; Marcon R.; Raulin J.-P.; Trottet G.; White S.M.

Comparison of 30 THz impulsive burst time development to microwaves, Hα, EUV, and GOES soft X-rays

item.page.type

Artigo

Date

2016

item.page.ispartof

Astronomy and Astrophysics

item.page.citationsscopus

4

Authors

Miteva R.
Kaufmann P.
Cabezas D.P.
Cassiano M.M.
Fernandes L.O.T.
Freeland S.L.
Karlicky M.
Kerdraon A.
Kudaka A.S.
Luoni M.L.
Marcon R.
Raulin J.-P.
Trottet G.
White S.M.

Abstract

© ESO, 2016.The recent discovery of impulsive solar burst emission in the 30 THz band is raising new interpretation challenges. One event associated with a GOES M2 class flare has been observed simultaneously in microwaves, Hα, 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 30 THz 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.

item.page.scopussubject

Complex relationships , High-energy particles , Multiple frequency , Non-thermal radiation , Sun: Chromosphere , Sun: flares , Sun: radio radiation , Sun:UV radiation