Results 21 to 30 of about 20,265 (219)
Radio Signatures of Solar Flare Reconnection
The Astrophysical Journal, 2005 The time evolution of plasma parameters (density, magnetic field, etc.) in a two-dimensional MHD model of solar flare reconnection is computed numerically. Then assuming plasma radio emission from locations where the "double-resonance" instability generates upper hybrid waves due to unstable distribution function of suprathermal electrons, the radio ...
M. Barta, M. Karlicky
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Cold Solar Flares. I. Microwave Domain
The Astrophysical Journal, 2023 We identify a set of ∼100 “cold” solar flares and perform a statistical analysis of them in the microwave range. Cold flares are characterized by a weak thermal response relative to nonthermal emission.
Alexandra L. Lysenko +6 more
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Effects of solar flares on the ionosphere as shown by the dynamics of ionograms recorded in Europe and South Africa [PDF]
Annales Geophysicae, 2019 We have investigated the solar flare effects on ionospheric absorption with the systematic analysis of ionograms measured at midlatitude and low-latitude ionosonde stations under different solar zenith angles.
V. Barta +5 more
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Radio Observations of High Energy Solar Flares [PDF]
Highlights of Astronomy, 2002 AbstractIn this paper we discuss some recent observations of radio emission produced by high energy electrons resulting from solar flares. We discuss the spatial structure of simple weak spiky burst emissions observed simultaneously, at 17 and 34 GHz with the Nobeyama Radio Heliograph (NoRH).
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Type III Radio Bursts and Solar Flares
, 2023 The 28th IUGG General Assembly (IUGG2023) (Berlin 2023)
Krupar, V. +8 more
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Scientific Reports, 2021 Regular and irregular variations in total electron content (TEC) are one of the most significant observables in ionospheric studies. During the solar cycle 24, the variability of ionosphere is studied using global positioning system derived TEC at a mid ...
Pantea Davoudifar +6 more
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Lightning, Solar Flares and Radio Galaxies [PDF]
Nature, 1966 IN 1925, when it was still believed that a potential of n × 109 V was necessary to cause a lightning flash1a, C. T. R. Wilson put forward the suggestion that the soft cosmic rays up to about 109 eV might be accounted for by runaway electrons in thundercloud fields1b.
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Statistical analysis of microflares as observed by the 4–8 GHz spectropolarimeter
Solar-Terrestrial Physics, 2023 Radio observations of weak events are one of the promising methods for studying energy release and non-thermal processes in the solar corona. The development of instrumental capabilities allows for radio observations of weak transient coronal events ...
Zhdanov D. A. +3 more
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Radio bursts of very short duration: Fine structure of solar flare emissions [PDF]
Geofísica Internacional, 2006 The fine time structure of sub-second radio events of solar flare emissions is described on the multichannel polarimeter of Station Basovizza at 237, 327, and 408 MHz frequencies.
R. E. Rodríguez Taboada +1 more
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Periodicities in microwave radio bursts of solar flares [PDF]
Proceedings of the International Astronomical Union, 2006 We analyze the periodicities for 294 solar flares observed by Nobeyama Radioheliograph over 6 discrete frequencies of 1, 2, 3.75, 9.4, 17 and 35 GHz during the solar cycle 23 between 1998 and 2004. Using Fourier analysis, we pick up the shortest period ($T_{\rm{s}}$) for each event at each frequency channel.
Zongjun Ning, M. D. Ding
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