The End of the Rainbow: What Can We Say About the Extragalactic Sub-Megahertz Radio Sky? [PDF]
, 2010 The Galactic disc is opaque to radio waves from extragalactic sources with frequencies nu less than ~3 MHz. However, radio waves with kHz, Hz, and even lower frequencies may propagate through the intergalactic medium (IGM).
Abbott +142 more
core +1 more source
Radio signature of cosmological structure formation shocks [PDF]
, 2006 In the course of the formation of cosmological structures, large shock waves are generated in the intra-cluster medium. In analogy to processes in supernova remnants, these shock waves may generate a significant population of relativistic electrons which,
Brueggen, Marcus, Hoeft, Matthias
core +3 more sources
The role of natural E-region plasma turbulence in the enhanced absorption of HF radio waves in the auroral ionosphere:Implications for RF heating of the auroral electrojet [PDF]
Annales Geophysicae, 1994 Physical processes which affect the absorption of radio waves passing through the auroral E-region when Farley-Buneman irregularities are present are examined.
T. R. Robinson
doaj +1 more source
Excitation of plasma waves by unstable photoelectron and thermal electron populations on closed magnetic field lines in the Martian ionosphere [PDF]
Annales Geophysicae, 2005 It is argued that anisotropic electron pitch angle distributions in the closed magnetic field regions of the Martian ionosphere gives rise to excitation of plasma instabilities.
N. Borisov, N. Borisov, E. Nielsen
doaj +1 more source
Two dimensional time evolution of beam-plasma instability in the presence of binary collisions [PDF]
, 2016 Energetic electrons produced during solar flares are known to be responsible for generating solar type III radio bursts. The radio emission is a byproduct of Langmuir wave generation via beam-plasma interaction and nonlinear wave-wave and wave-particle ...
Kontar, Eduard +3 more
core +2 more sources
A tunable metamaterial absorber using varactor diodes
New Journal of Physics, 2013 We present the design, analysis and measurements of a polarization-insensitive tunable metamaterial absorber with varactor diodes embedded between metamaterial units.
Jie Zhao +5 more
doaj +1 more source
Propagation of Electromagnetic Wave into an Illuminated Polysilicon PV Cell
International Journal of Antennas and Propagation, 2020 The increasing cohabitation between telecommunication antennas generating electromagnetic waves and solar panels poses the problem of interaction between these radio waves and solar cells. In order to study the effect of radio waves on the performance of
Vinci de Dieu Bokoyo Barandja +5 more
doaj +1 more source
Experimental simulation of satellite observations of 100 kHz radio waves from relativistic electron beams above thunderclouds [PDF]
Atmospheric Chemistry and Physics, 2011 Relativistic electron beams above thunderclouds emit 100 kHz radio waves which illuminate the Earth's atmosphere and near-Earth space. This contribution aims to clarify the physical processes which are relevant for the spatial spreading of the radio ...
M. Füllekrug, C. Hanuise, M. Parrot
doaj +1 more source
Space-borne radar observation of near-surface wind effect on anomalously highly-directional backscattering of radio waves from aeolian processes of sand and dust transporting in desert regions [PDF]
Радиофизика и электроника, 2020 Subject and purpose. The purpose of this work is to study the effect of wind on the anomalous scattering of radio waves during aeolian processes of sand and dust transporting. Мethods and methodology. The article analyzes the spatial variations of the
D.M. Bychkov +4 more
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Dynamics of electron beams in the solar corona plasma with density fluctuations [PDF]
, 2001 The problem of beam propagation in a plasma with small scale and low intensity inhomogeneities is investigated. It is shown that the electron beam propagates in a plasma as a beam-plasma structure and is a source of Langmuir waves.
Benz +32 more
core +2 more sources