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Brightness temperature of decameter solar bursts with high-frequency cut-off

    A. A. STANISLAVSKY, A. A. KONOVALENKO, YA. S. VOLVACH, A. A. KOVAL

Planetary Radio Emissions VIII, pp. 391-402, 2018/08/16

Proceedings of the 8th International Workshop on Planetary, Solar and Heliospheric Radio Emissions held at Seggauberg near Graz, Austria, October 25–27, 2016

doi: 10.1553/PRE8s391

doi: 10.1553/PRE8s391

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doi:10.1553/PRE8s391



doi:10.1553/PRE8s391

Abstract

In this paper we consider solar bursts with a high-frequency cut-off, simultaneously observed by several ground-based radio observatories located at significant distances from each other. The events were correlated with the emergence of a new group of solar spots on the far side of the Sun. The cut-off effect of the solar bursts was caused by the occultation of their radiating sources by the solar corona for observers on Earth. Based on the radio occultation of the low-frequency burst sources in the solar corona, we have estimated their angular sizes. This makes it possible to obtain the dynamic spectra of the solar bursts in terms of brightness temperature.