caa a22 4500 445347228 CHVBK 20180317142832.0 cr unu---uuuuu 170323e20111101xx s 000 0 eng 10.1007/s11207-011-9794-6 doi (NATIONALLICENCE)springer-10.1007/s11207-011-9794-6 Magnetoacoustic Wave Trains in the 11 July 2005 Radio Event with Fiber Bursts [Elektronische Daten] [H. Mészárosová, M. Karlický, J. Rybák] Adm-radio emission with fiber bursts observed on 11July 2005 was analyzed using wavelet filtration and spectral methods. In filtered radio spectra we found structures with different characteristic periodP and frequency drift FD: i)fiber substructures (composed of dot emissions) with P 1≈0.5s, FD1=− 87MHz s−1 on average, ii)fiber structures with P 2≈1.9s, and iii)drifting structures with P 3≈81.4s, FD2=− 8.7, + 98.5, and − 21.8MHz s−1. In the wavelet spectra we recognized patterns having the form of tadpoles. They were detected with the same characteristic periodsP as found for the filtered structures. The frequency drift of the tadpole heads is found to be equal to the frequency drift of some groups of fibers for the long-period wavelet tadpoles (P 3) and to the frequency drift of individual fibers for the short-period tadpoles (P 2). Considering these wavelet tadpoles as signatures of propagating magnetoacoustic wave trains, the results indicate thepresence of several wave trains in the fibers' source. While the long-period wave trains trigger or modulate awhole group of fibers, the short-period ones look like being connected with individual fiber bursts. This result supports the model of fibers based on magnetoacoustic waves. Using a density model of the solar atmosphere we derived the velocities of the magnetoacoustic waves, 107 and 562km s−1, and setting them equal to the Alfvén ones we estimated the magnetic field in the source of fiber bursts as 10.7 and 47.8G. Springer Science+Business Media B.V., 2011 Sun: corona nationallicence Sun: flares nationallicence Sun: radio radiation nationallicence Sun: oscillations nationallicence Methods: data analysis nationallicence Mészárosová H. Astronomical Institute, Academy of Sciences of the Czech Republic, 25165, Ondřejov, Czech Republic aut Karlický M. Astronomical Institute, Academy of Sciences of the Czech Republic, 25165, Ondřejov, Czech Republic aut Rybák J. Astronomical Institute, Slovak Academy of Sciences, 05960, Tatranská Lomnica, Slovak Republic aut Solar Physics Springer Netherlands 273/2(2011-11-01), 393-402 0038-0938 273:2<393 2011 273 11207 https://doi.org/10.1007/s11207-011-9794-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11207-011-9794-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mészárosová H. Astronomical Institute, Academy of Sciences of the Czech Republic, 25165, Ondřejov, Czech Republic aut NATIONALLICENCE 700 1- Karlický M. Astronomical Institute, Academy of Sciences of the Czech Republic, 25165, Ondřejov, Czech Republic aut NATIONALLICENCE 700 1- Rybák J. Astronomical Institute, Slovak Academy of Sciences, 05960, Tatranská Lomnica, Slovak Republic aut NATIONALLICENCE 773 0- Solar Physics Springer Netherlands 273/2(2011-11-01), 393-402 0038-0938 273:2<393 2011 273 11207 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer