naa a22 4500 510790305 CHVBK 20180411083317.0 cr unu---uuuuu 180411e20130401xx s 000 0 eng 10.1134/S1063773713040063 doi (NATIONALLICENCE)springer-10.1134/S1063773713040063 Fine structure of the sources of quasi-periodic pulsations in "single-loop” solar flares [Elektronische Daten] [I. Zimovets, S. Kuznetsov, A. Struminsky] Analysis of the observational data obtained with a high angular resolution in the ranges of vacuum ultraviolet (1″, TRACE) and hard X-ray (4″, RHESSI) emissions in some solar flares previously considered "single-loop” ones shows that they are not such flares. The thick single loops with a diameter of 13″-21″ observed in these flares in the microwave range with an angular resolution of 5″-10″ (NoRH) are actually arcades of thinner loops with a diameter of less than 3″. In this case, the observed quasi-periodic pulsations of microwave emission are not a consequence of the oscillations of an isolated thick loop, as is usually assumed, but a result of the successive involvement of many relatively thinner loops in the process of flare energy release. The established facts impose significant constraints on the generation models of pulsations in flares. Pleiades Publishing, Ltd., 2013 solar flares nationallicence microwave nationallicence ultraviolet nationallicence hard X-ray emission nationallicence pulsations nationallicence Zimovets I. Space Research Institute, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, 117997, Moscow, Russia aut Kuznetsov S. Radiophysical Research Institute, Nizhni Novgorod, Russia aut Struminsky A. Space Research Institute, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, 117997, Moscow, Russia aut Astronomy Letters SP MAIK Nauka/Interperiodica 39/4(2013-04-01), 267-278 1063-7737 39:4<267 2013 39 11443 https://doi.org/10.1134/S1063773713040063 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1063773713040063 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zimovets I. Space Research Institute, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, 117997, Moscow, Russia aut NATIONALLICENCE 700 1- Kuznetsov S. Radiophysical Research Institute, Nizhni Novgorod, Russia aut NATIONALLICENCE 700 1- Struminsky A. Space Research Institute, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, 117997, Moscow, Russia aut NATIONALLICENCE 773 0- Astronomy Letters SP MAIK Nauka/Interperiodica 39/4(2013-04-01), 267-278 1063-7737 39:4<267 2013 39 11443 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer