Pulsations of non-thermal emissions from the solar flare of November 5, 1992 and the trap-plus-precipitation model

• Published in: Bulletin of the Crimean Astrophysical Observatory Vol. 109; no. 1; pp. 90 - 97
• Main Authors: Goldvarg, T. B., Tsap, Yu. T., Kopylova, Yu. G., Stepanov, A. V.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.06.2013; Springer Nature B.V
• Subjects: Astronomy; Astrophysics and Cosmology; Corona; Fluid mechanics; Physics; Physics and Astronomy; Solar flares; Solar physics; Sun; The Sun; solar flare; microwave and X-ray emission; MHD-oscillations of coronal loops
• ISSN: 0190-2717; 1934-7863
• DOI: 10.3103/S0190271713010075

The fine structure of the time variations of microwave and hard X-ray emissions from the solar flare of November 5, 1992 was analyzed. On the basis of the wavelet analysis, pulsations of intensity with a period of about 6 s were revealed in both the data sets. The observed time delay between the coronal plasma emission measure maximum and the temperature maximum is consistent with the concept of chromospheric evaporation. The anticorrelation observed between the time profiles of the microwave and hard X-ray emissions and the nature of the time delays between the peaks are associated with the excitation of radial fast magneto-acoustic oscillations in the flare loop (a coronal trap). Consequences of the obtained results are discussed.