caa a22 4500 44534671X CHVBK 20180317142831.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s11207-010-9703-4 doi (NATIONALLICENCE)springer-10.1007/s11207-010-9703-4 Observations of Powerful Type III Bursts intheFrequency Range 10 - 30 MHz [Elektronische Daten] [V. Melnik, A. Konovalenko, H. Rucker, A. Boiko, V. Dorovskyy, E. Abranin, A. Lecacheux] The properties of powerful (flux >10−19W m−2 Hz−1) type III bursts observed in July - August 2002 by the radio telescope UTR-2 at frequencies 10 - 30MHz are analyzed. Most bursts have been registered when the active regions associated to these bursts were located near the central meridian or at 40° - 60° to the East or West from it. All powerful type III bursts drift from high to low frequencies with frequency drift rates 1 - 2.5MHz s−1. It is important to emphasize that according to our observations the drift rate is linearly increasing with frequency. The duration of the bursts changes mainly from 6s at frequency 30MHz up to 12s at 10MHz. The instantaneous frequency bandwidth does not depend on the day of observations, i.e. on the disk location of the source active region, and is increasing with frequency. The results of observational properties are discussed in the frame of the standard plasma model of type III bursts radio emission. Springer Science+Business Media B.V., 2011 Decameter range nationallicence Powerful type III bursts nationallicence Active regions nationallicence Frequency drift rates nationallicence Durations nationallicence Frequency bandwidths nationallicence Fluxes nationallicence Plasma mechanism of generation nationallicence Melnik V. Institute of Radio Astronomy, National Academy of Sciences of Ukraine, Kharkov, Ukraine aut Konovalenko A. Institute of Radio Astronomy, National Academy of Sciences of Ukraine, Kharkov, Ukraine aut Rucker H. Space Research Institute, Austrian Academy of Sciences, Graz, Austria aut Boiko A. Institute of Radio Astronomy, National Academy of Sciences of Ukraine, Kharkov, Ukraine aut Dorovskyy V. Institute of Radio Astronomy, National Academy of Sciences of Ukraine, Kharkov, Ukraine aut Abranin E. Institute of Radio Astronomy, National Academy of Sciences of Ukraine, Kharkov, Ukraine aut Lecacheux A. CNRS - Observatoire de Paris, LESIA, Meudon, France aut Solar Physics Springer Netherlands 269/2(2011-04-01), 335-350 0038-0938 269:2<335 2011 269 11207 https://doi.org/10.1007/s11207-010-9703-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11207-010-9703-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Melnik V. Institute of Radio Astronomy, National Academy of Sciences of Ukraine, Kharkov, Ukraine aut NATIONALLICENCE 700 1- Konovalenko A. Institute of Radio Astronomy, National Academy of Sciences of Ukraine, Kharkov, Ukraine aut NATIONALLICENCE 700 1- Rucker H. Space Research Institute, Austrian Academy of Sciences, Graz, Austria aut NATIONALLICENCE 700 1- Boiko A. Institute of Radio Astronomy, National Academy of Sciences of Ukraine, Kharkov, Ukraine aut NATIONALLICENCE 700 1- Dorovskyy V. Institute of Radio Astronomy, National Academy of Sciences of Ukraine, Kharkov, Ukraine aut NATIONALLICENCE 700 1- Abranin E. Institute of Radio Astronomy, National Academy of Sciences of Ukraine, Kharkov, Ukraine aut NATIONALLICENCE 700 1- Lecacheux A. CNRS - Observatoire de Paris, LESIA, Meudon, France aut NATIONALLICENCE 773 0- Solar Physics Springer Netherlands 269/2(2011-04-01), 335-350 0038-0938 269:2<335 2011 269 11207 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer