Journal ArticleDOI
A theory of the terrestrial kilometric radiation
C. S. Wu,Lou-Chuang Lee +1 more
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TLDR
In this paper, it was found that reflected electrons can result in the amplification of electromagnetic waves via a relativistic normal cyclotron resonance, which may explain the recently discovered terrestrial kilometric radiation.Abstract:
During magnetospheric substorms, electrons with energies of about 1 keV are injected from the plasma-sheet region into the auroral region. A fraction of these energetic electrons can precipitate into the upper atmosphere, and the rest are reflected because of the mirror effect of the convergent geomagnetic field. It is found that these reflected electrons can result in the amplification of electromagnetic waves via a relativistic normal cyclotron resonance. This process may explain the recently discovered terrestrial kilometric radiation.read more
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Journal ArticleDOI
Electron cyclotron maser emission at oblique angles
D. B. Melrose,George A. Dulk +1 more
TL;DR: In this article, the causes of electron cyclotron maser emissions (ECMEs) at oblique angle (about 60 degrees) to the magnetic field are investigated. And a mechanism is proposed that might produce an appropriate "spiraling beam" distribution, with a peak in velocity space at speed v - v(0) and pitch angle alpha = alpha(0), not equal to 0.
Journal ArticleDOI
AKR disappearance during magnetic storms
Akira Morioka,Yoshizumi Miyoshi,Yoshizumi Miyoshi,T. Seki,Fuminori Tsuchiya,Hiroaki Misawa,Hiroshi Oya,Hiroshi Matsumoto,Kozo Hashimoto,Tokuo Mukai,K. Yumoto,Tsutomu Nagatsuma +11 more
TL;DR: In this article, the authors investigated the behavior of the storm-time auroral kilometric radiation (AKR) and its related particle precipitation in magnetic storms and found that AKR often disappears in the initial and main phases of the magnetic storms in spite of the large enhancement of AE index and field-aligned current.
Journal ArticleDOI
Further evidence for a connection between auroral kilometric radiation and ground‐level signals measured in Antarctica
James LaBelle,X. Yan,M. C. Broughton,S. Pasternak,M. P. Dombrowski,Roger R. Anderson,Harald U. Frey,Allan T. Weatherwax,Yusuke Ebihara +8 more
TL;DR: In this article, the first full-resolution measurements of ground-level AKR-like signals were obtained from four Antarctic observatories, and their fine structure strongly resembles that of AKR as known from high-resolution spacecraft receivers.
Journal ArticleDOI
Properties of Saturn Kilometric Radiation measured within its source region
L. Lamy,P. Schippers,Philippe Zarka,Baptiste Cecconi,Chris S. Arridge,Chris S. Arridge,Michele K. Dougherty,P. Louarn,N. André,William S. Kurth,Robert L. Mutel,Donald A. Gurnett,Andrew J. Coates,Andrew J. Coates +13 more
TL;DR: In this paper, the authors used radio, magnetic field and particle observations to characterize the source region of an extra-terrestrial auroral radio emission, and found that SKR sources are surrounded by a hot tenuous plasma, in a region of upward field-aligned currents.
Journal ArticleDOI
Alfvén: magnetosphere—ionosphere connection explorers
Matthieu Berthomier,Andrew Fazakerley,Colin Forsyth,R. Pottelette,Olga Alexandrova,Anastasios Anastasiadis,Anasuya Aruliah,P.-L. Blelly,C. Briand,Roberto Bruno,P. Canu,Baptiste Cecconi,T. Chust,Ioannis A. Daglis,J. A. Davies,M. W. Dunlop,Dominique Fontaine,Vincent Génot,Björn Gustavsson,Gerhard Haerendel,Maria Hamrin,Mike Hapgood,Sebastien Hess,Dhiren Kataria,Kirsti Kauristie,S. Kemble,Yu. V. Khotyaintsev,Hannu Koskinen,Laurent Lamy,Betty Lanchester,P. Louarn,E. A. Lucek,Rickard Lundin,Milan Maksimovic,J. Manninen,Aurélie Marchaudon,Octav Marghitu,Göran Marklund,Stephen E. Milan,Joran Moen,F. Mottez,Holger Nilsson,Nikolai Østgaard,Christopher J. Owen,Michel Parrot,Arne Pedersen,C. H. Perry,Jean-Louis Pinçon,F. Pitout,Tuija Pulkkinen,I. J. Rae,Laurence Rezeau,Alain Roux,Ingrid Sandahl,Ingmar Sandberg,E. Turunen,Joachim Vogt,Andrew Walsh,Clare E. J. Watt,Jim Wild,Masatoshi Yamauchi,Philippe Zarka,I. Zouganelis +62 more
TL;DR: The aurorae are dynamic, luminous displays that grace the night skies of Earth's high latitude regions as discussed by the authors, but the chain of plasma physical processes leading to auroral displays is complex.
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