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  • Comparison of 30 THz impuls...
    Miteva, R.; Kaufmann, P.; Cabezas, D. P.; Cassiano, M. M.; Fernandes, L. O. T.; Freeland, S. L.; Karlický, M.; Kerdraon, A.; Kudaka, A. S.; Luoni, M. L.; Marcon, R.; Raulin, J.-P.; Trottet, G.; White, S. M.

    Astronomy and astrophysics (Berlin), 02/2016, Volume: 586
    Journal Article

    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.