Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/1688
Title: Harmonically related decimetric fine structures
Authors: Sawant, H. S
Fernandes, F. C. R
Karlický, M
Mészárosová, H
Krishan, V
Cecatto, J. R
Madsen, F. R. H
Andrade, M. C
Keywords: Solar flares;Radio radiation;Harmonically related decimetric fine structures;Plasma emission;Acceleration region
Issue Date: Feb-2006
Publisher: Elsevier B.V.
Citation: Advances in Space Research, Vol. 38, pp. 406-410
Abstract: We report rare events, above 1000 MHz, in which emission at the fundamental and at second harmonic frequencies show nearly identical fine structures. These high resolution observations are obtained from the Brazilian Solar Radio Spectrograph operating in the frequency range (2150 ± 100) MHz, and the Ondrejov observatory Solar Radio Spectrograph operating in the frequency range of (800–2000) MHz. These bursts have flux values of about 300 s.f.u. and total duration between 100 and 500 ms. The frequency and flux ratios of the harmonically related narrow band bursts varied from 1.76 to 2.29 and 1.28 to 3.57, respectively. The lower observed flux of the fundamental component in comparison to the second harmonic could be due to its higher collisional absorption assuming that the generation mechanism of these bursts is due to the beam plasma interaction. The heights of the acceleration regions estimated from the starting frequencies of the decimetric fine structures are less-than-or-equals, slant104 km.
Description: Restricted Access
URI: http://hdl.handle.net/2248/1688
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Appears in Collections:IIAP Publications

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