Results 171 to 180 of about 20,265 (219)

RADIO EMISSION FROM SOLAR FLARES

Annual Review of Astronomy and Astrophysics, 1998
▪ Abstract  Radio emission from solar flares offers a number of unique diagnostic tools to address long-standing questions about energy release, plasma heating, particle acceleration, and particle transport in magnetized plasmas. At millimeter and centimeter wavelengths, incoherent gyrosynchrotron emission from electrons with energies of tens of kilo ...
T. S. Bastian, A. O. Benz, D. E. Gary
openaire   +1 more source

Optical-to-Radio Continua in Solar Flares

Solar Physics, 2011
Spectral continua observed during solar flares may contain information about both thermal and non-thermal heating mechanisms. Using two semi-empirical flare models F2 and FLA, we synthesize the thermal continua from optical to mm–radio domains and compare their intensities with quiet-Sun values computed from a recent model C7.
P. Heinzel, E. H. Avrett
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Radio Diagnostics of the Solar Flare Reconnection

Space Science Reviews, 2005
First, high-frequency (HF) slowly drifting pulsating structures are interpreted as radio emissions of electron beams accelerated in the magnetic reconnection volume and injected into magnetic islands (plasmoids). Then, the time evolution of plasma parameters (density, magnetic field, etc.) in a 2-D MHD model of solar flare reconnection is computed ...
Marian Karlický, Miroslav Bárta
openaire   +1 more source

Association of Radio Outbursts with Solar Flares

Nature, 1959
SEVERAL authors have paid attention to the association of radio outbursts with solar flares, for example, Dodson1 and Loughhead, Roberts and McCabe2. Outstanding flare events are very commonly accompanied by a radio event at decimeter and/or metre wave-lengths; but only a minor fraction of the less-important flares produce a distinctive radio event.
L. D. DE FEITER, A. D. FOKKER, J. ROOSEN
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Directivity of Radio Emission from Solar Flares

Publications of the Astronomical Society of Japan, 1985
Abstract The center-limb variation of the solar microwave burst intensity is investigated statistically with a sufficient number of events (~ 1000) at 17 GHz far above the mean turnover frequency of the microwave burst spectrum. The intensity of bursts (except that of GRF bursts) is independent of the disk longitude, which is slightly ...
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Radio Emission Processes Related to Solar Flares

1988
The different types of radio emissions during solar flares are reviewed. Among the short time emissions, blips, spikes, fibers, and pulsations are the most interesting. Spikes may be signatures of elementary flare acceleration events. Their radiation mechanism is still unknown. Among the long term emissions we concentrate on the solar noise storm.
Rudolf A. Treumann, Cesar La Hoz
openaire   +1 more source

Impulsive acceleration during gradual type solar radio flares

Advances in Space Research, 1997
Abstract Gradual rise and fall type solar radio flares recorded at 37 GHz (8 mm wavelength) are analysed and compared with simultaneous soft and hard X-ray events. Emission measures and plasma temperatures were calculated from the GOES soft X-ray data, and optically thin thermal bremsstrahlung flux at 37 GHz was calculated assuming the same emitting ...
S. Pohjolainen, E. Valtaoja, S. Urpo
openaire   +1 more source

Homology of solar flare-associated radio events

Solar Physics, 1967
The concept of homology, introduced by Ellison, McKenna, and Rceid (1960) for optical flares, can be extended to flare-associated radio events. Successive flares within the same centre of activity sometimes produce radio events that are remarkably similar.
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Extended decimeter radio emission after large solar flares

Advances in Space Research, 2006
Abstract The large solar flares of October and November 2003 were accompanied by extremely intense radio emissions at decimeter wavelengths. The radio emission continued long after the main phase of the flares and reached an unprecedented peak flux density at 410 MHz of 6.3(±0.7) × 10 5 solar flux units on 2003, October 28.
A.O. Benz   +3 more
openaire   +1 more source

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