منابع مشابه
Radio Emission of Solar Flare Particle Acceleration
The solar corona is a very dynamic plasma on time scales of decades to a few milliseconds. Radio missions provide diagnostic tools particularly suited for the analysis of non-thermal electron distributions, enhanced levels of various kinds of plasma waves and plasma phenomena related to electron acceleration in flares. Very intense coherent emissions are observed at frequencies below about 3GHz...
متن کاملFlare-generated acoustic oscillations in solar and stellar coronal loops
Long period longitudinal oscillations of a flaring coronal loop are studied numerically. In the recent work of Nakariakov et al. (2004) it has been shown that the time dependence of density and velocity in a flaring loop contain pronounced quasi-harmonic oscillations associated with the 2nd harmonic of a standing slow magnetoacoustic wave. In this work we investigate the physical nature of thes...
متن کاملObservational evidence for return currents in solar flare loops
Context. The common flare scenario comprises an acceleration site in the corona and particle transport to the chromosphere. Using satellites available to date it has become possible to distinguish between the two processes of acceleration and transport, and study the particle propagation in flare loops in detail, as well as complete comparisons with theoretical predictions. Aims. We complete a ...
متن کاملCatalogue of 1{3 Ghz Solar Flare Radio Emission
Solar ares frequently radiate in the 1{3 GHz range, the lowest frequency microwaves, but not much is known about the spectral shape of these emissions. We present a catalogue of selected bursts observed with a new spectrometer at ETH Zurich in the years 1989{1993. The original data set includes 268 events of various types. Featureless broadband continua generally attributed to gyrosynchrotron e...
متن کاملSolar Flare Cycles
We present a review of different solar flare periodicity intervals. Our analysis includes a statistical investigation of flare occurrence and N-S hemispheric distribution over the last three 11-yr solar cycles (SCs 21-23, corresponding to the period 1976-2001). Moreover, we try to estimate if there is any connection between the flare activity and the strength of solar cycles. For that purpose, ...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2006
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921306001463