scholarly journals Azmode electron-cyclotron maser model for bottomside ionospheric harmonic radio emissions

1998 ◽  
Vol 103 (A4) ◽  
pp. 7017-7026 ◽  
Author(s):  
A. J. Willes ◽  
S. D. Bale ◽  
Z. Kuncic
Keyword(s):  
Electron Cyclotron ◽  
Radio Emissions ◽  
Electron Cyclotron Maser ◽  
Cyclotron Maser

scholarly journals The Loss-cone Driven Electron-cyclotron Maser

1982 ◽  
Vol 35 (4) ◽  
pp. 447 ◽  
Author(s):  
RG Hewitt ◽  
DB Melrose ◽  
KG Rönnmark
Keyword(s):  
Relativistic Correction ◽  
Electron Cyclotron ◽  
Important Class ◽  
Instability Mechanism ◽  
Loss Cone ◽  
Radio Emissions ◽  
Electron Cyclotron Maser ◽  
Cyclotron Maser ◽  
Class B

Electron-cyclotron instabilities may be classified in two ways depending on whether the relativistic correction to the gyrofrequency is important (class S) or not (class N), and whether the instability mechanism is of a maser type (class M) or due to bunching (class B). Renewed interest in class SM has followed the Wu and Lee application of it to the interpretation of terrestrial kilometric radiation. The maser is assumed to be driven by a one-sided loss-cone distribution of electrons. This mechanism seems particularly favourable for the interpretation of certain planetary, solar and stellar radio emissions

scholarly journals ORIGIN OF ELECTRON CYCLOTRON MASER INDUCED RADIO EMISSIONS AT ULTRACOOL DWARFS: MAGNETOSPHERE-IONOSPHERE COUPLING CURRENTS

2012 ◽  
Vol 760 (1) ◽  
pp. 59 ◽  
Author(s):  
J. D. Nichols ◽  
M. R. Burleigh ◽  
S. L. Casewell ◽  
S. W. H. Cowley ◽  
G. A. Wynn ◽  
...  
Keyword(s):  
Electron Cyclotron ◽  
Radio Emissions ◽  
Electron Cyclotron Maser ◽  
Cyclotron Maser ◽  
Ultracool Dwarfs

scholarly journals Radio observations of HD 80606 near planetary periastron

2020 ◽  
Vol 644 ◽  
pp. A157
Author(s):  
F. de Gasperin ◽  
T. J. W. Lazio ◽  
M. Knapp
Keyword(s):  
Solar System ◽  
Radio Emission ◽  
Extrasolar Planets ◽  
Giant Planet ◽  
Electron Cyclotron ◽  
Polar Regions ◽  
Radio Observations ◽  
Radio Emissions ◽  
Electron Cyclotron Maser ◽  
Cyclotron Maser

Context. All the giant planets in the Solar System generate radio emission via electron cyclotron maser instability, giving rise most notably to Jupiter’s decametric emissions. An interaction with the solar wind is at least partially responsible for all of these Solar System electron cyclotron masers. HD 80606b is a giant planet with a highly eccentric orbit, leading to predictions that its radio emission may be enhanced substantially near periastron. Aims. This paper reports observations with the Low Frequency Array (LOFAR) of HD 80606b near its periastron in an effort to detect radio emissions generated by an electron cyclotron maser instability in the planet’s magnetosphere. Methods. The reported observations are at frequencies between 30 and 78 MHz, and they are distinguished from most previous radio observations of extrasolar planets by two factors: (i) they are at frequencies near 50 MHz, much closer to the frequencies at which Jupiter emits (ν < 40 MHz) and lower than most previously reported observations of extrasolar planets; and (ii) sensitivities of approximately a few millijanskys have been achieved, an order of magnitude or more below nearly all previous extrasolar planet observations below 100 MHz. Results. We do not detect any radio emissions from HD 80606b and use these observations to place new constraints on its radio luminosity. We also revisit whether the observations were conducted at a time when HD 80606b was super-Alfvénic relative to the host star’s stellar wind, which experience from the Solar System illustrates is a state in which an electron cyclotron maser emission can be sustained in a planet’s magnetic polar regions.

Slow-wave electron cyclotron maser

1988 ◽  
Vol 38 (6) ◽  
pp. 2883-2888 ◽  
Author(s):  
T. H. Kho ◽  
A. T. Lin
Keyword(s):  
Slow Wave ◽  
Electron Cyclotron ◽  
Electron Cyclotron Maser ◽  
Cyclotron Maser
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