Plasma emission from isotropic Langmuir turbulence - Are radio microbursts structureless?

Details Plasma emission from isotropic Langmuir turbulence - Are radio microbursts structureless? Plasma emission from isotropic Langmuir turbulence - Are radio microbursts structureless?

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...402..326g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 402, no. 1, p. 326-333.

Astronomy and Astrophysics

Astrophysics

13

Isotropic Turbulence, Magnetohydrodynamic Turbulence, Plasma Radiation, Solar Radio Emission, Type 3 Bursts, Electrostatic Waves, Emission Spectra, Solar Corona

Scientific paper

The brightness temperature of radio emission through the fundamental and second harmonic plasma processes is determined for isotropic Langmuir waves of low-energy density in order to account for the microbursts at meter-dekameter wavelengths. The probable cause for low levels of Langmuir turbulence is the presence of isotropic density fluctuations in the corona which isotropize the beam-generated Langmuir waves. We determined the energy density of Langmuir waves attainable from the beam-plasma instability in the presence of isotropic density fluctuations. Since the electron density fluctuations isotropize the beam-generated plasma waves, the head-on collision of plasma waves becomes efficient to produce the second harmonic plasma emission. For reasonable beam parameters, the brightness temmperature of the fundamental never exceeds 10 exp 6 K, while the second harmonic covers the observed range of microburst brightness temperatures. Thus, the microbursts are predominantly at second harmonic. This leads to an important conclusion that the microbursts are structureless, similar to a population of normal type III bursts of low polarization with no fundamental-harmonic structure.

Affiliated with

Also associated with

No associations

Rating

Plasma emission from isotropic Langmuir turbulence - Are radio microbursts structureless? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Plasma emission from isotropic Langmuir turbulence - Are radio microbursts structureless?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Plasma emission from isotropic Langmuir turbulence - Are radio microbursts structureless? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1775941