EDP Sciences
Free access
Volume 396, Number 3, December IV 2002
Page(s) 1015 - 1018
Section The Sun
DOI http://dx.doi.org/10.1051/0004-6361:20021493

A&A 396, 1015-1018 (2002)
DOI: 10.1051/0004-6361:20021493

Observation of harmonically related solar radio zebra patterns in the 1-4 GHz frequency range

H. S. Sawant1, M. Karlický2, F. C. R. Fernandes1 and J. R. Cecatto1

1  Instituto Nacional de Pesquisas Espaciais, INPE, CP 515, 12201-970 São José dos Campos, SP, Brazil
2  Astronomical Institute of the Academy of Sciences of the Czech Republic, 25165 Ondrejov, Czech Republic

(Received 12 March 2002 / Accepted 24 September 2002 )

A unique case of two zebra patterns related harmonically with ratio of ~1:2 was observed by distant radio telescopes at São José dos Campos and Ondrejov Observatories. Accompanied zebras show that the ratio of frequencies of the neighboring zebra lines is in the range of 1.009-1.037. There is a tendency of a decrease of this ratio with decreasing frequency within the specific zebra pattern. Both facts speak in favour of plasma emission models for the zebra pattern fine structure in radio burst continua.

Key words: plasmas -- Sun: flares -- Sun: radio radiation

Offprint request: H. S. Sawant, guga@das.inpe.br

© ESO 2002