Dynamics of Langmuir and ion-sound waves in type III solar radio sources

1993 ◽  
Vol 408 ◽  
pp. 720 ◽  
Author(s):  
P. A. Robinson ◽  
A. J. Willes ◽  
I. H. Cairns
Keyword(s):  
Solar Radio ◽  
Radio Sources ◽  
Sound Waves ◽  
Type Iii

The Effect of Scattering on Solar Radio Sources at 80 MHz

1972 ◽  
Vol 2 (2) ◽  
pp. 98-100 ◽  
Author(s):  
A. C. Riddle
Keyword(s):  
Plasma Level ◽  
Electron Density ◽  
Solar Radio ◽  
Brightness Distribution ◽  
Time Profile ◽  
Radio Sources ◽  
Density Structure ◽  
Localized Source ◽  
Type Iii

Scattering of radiation from solar radio sources by in homogeneities in the electron density structure of the corona can have marked effects on the observed time profile and the brightness distribution. These effects are appreciable for any localized source emitting a brief burst of radiation and are most pronounced when the radiation propagates close to the plasma level; it is such sources, illustrated here by those of type III bursts, that will be considered in this paper.

scholarly journals The Mechanism Responsible for 'Shadow' Type III Solar Radio Bursts. II. Absorption due to Ion Sound Turbulence

1974 ◽  
Vol 27 (2) ◽  
pp. 271 ◽  
Author(s):  
DB Melrose
Keyword(s):  
Energy Density ◽  
Solar Radio ◽  
Plasma Frequency ◽  
Radio Bursts ◽  
Sound Waves ◽  
Solar Radio Bursts ◽  
Langmuir Waves ◽  
Transverse Waves ◽  
Type Iii ◽  
Ion Plasma

The hypothesis is explored that ion sound turbulence generated by the exciting agency for type III bursts is responsible for shadow type III events. The possible absorption mechanisms are listed: the most favourable are the coalescence of transverse waves and ion sound waves into Langmuir waves or the decay of transverse waves into Langmuir waves and ion sound waves. These mechanisms can operate only if the background source emits at the fundamental plasma frequency and the absorbing region is directly above it (;$ 3 x 104 km). It is found that the event discussed by Kai (1973) can be explained in terms of such absorption with reasonable parameters, e.g. with an energy density in ion sound turbulence W' ~ 10-12 ergcm- 3 at frequencies co' ~ O�3cop! (where cop! is the ion plasma frequency).

The Heights of Solar Radio Sources at 1424 MHz and 696 MHz

1969 ◽  
Vol 1 (5) ◽  
pp. 192-194 ◽  
Author(s):  
D. G. Cole ◽  
R. F. Mullaly
Keyword(s):  
Solar Activity ◽  
High Resolution ◽  
Solar Disk ◽  
Previous Investigation ◽  
Solar Radio ◽  
Radio Sources ◽  
Grating Interferometer ◽  
Maximum Solar Activity

The heights of solar radio sources at 1424 MHz and 696 MHz have been measured during the years 1965 and 1966. Solar activity at this time was near minimum. The number of radio sources appearing on the solar disk rarely exceeded three at any time and it thus was possible to resolve the majority of these with a high resolution grating interferometer. Many of the previous height measurements at these frequencies have been made near times of maximum solar activity and the confusion of sources within the beam has limited their accuracy. The number of sources studied here is quite considerably higher than in any previous investigation at these frequencies, and the period of observation has been continuous.

scholarly journals A statistical study of solar radio Type III bursts and space weather implication

2020 ◽  
Author(s):  
Theogene Ndacyayisenga ◽  
Jean Uwamahoro ◽  
K. Sasikumar Raja ◽  
Christian Monstein
Keyword(s):  
Space Weather ◽  
Solar Radio ◽  
Statistical Study ◽  
Type Iii

Electron Exciter Speeds Associated with Interplanetary Type III Solar Radio Bursts

Solar Physics ◽  
2015 ◽  
Vol 290 (10) ◽  
pp. 2975-3004 ◽  
Author(s):  
M. J. Reiner ◽  
R. J. MacDowall
Keyword(s):  
Solar Radio ◽  
Radio Bursts ◽  
Solar Radio Bursts ◽  
Type Iii

Coincident bursts of auroral kilometric radiation and VLF emissions associated with a type III solar radio noise event

1995 ◽  
Vol 100 (A1) ◽  
pp. 281
Author(s):  
T. J. Rosenberg ◽  
S. Singh ◽  
C. S. Wu ◽  
J. LaBelle ◽  
R. A. Treumann ◽  
...  
Keyword(s):  
Solar Radio ◽  
Radio Noise ◽  
Type Iii ◽  
Auroral Kilometric Radiation ◽  
Vlf Emissions
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