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Titolo:
Whistler waves, Langmuir waves and single loss cone electron distributionsinside a magnetic cloud: Observations
Autore:
Moullard, O; Burgess, D; Salem, C; Mangeney, A; Larson, DE; Bale, SD;
Indirizzi:
European Space Agcy, Estec, Dept Space Sci, NL-2200 AG Noordwijk, Netherlands European Space Agcy Noordwijk Netherlands NL-2200 AG rdwijk, Netherlands Univ London Queen Mary & Westfield Coll, Astron Unit, London E1 4NS, England Univ London Queen Mary & Westfield Coll London England E1 4NS S, England Observ Paris, DESPA, F-92195 Meudon, France Observ Paris Meudon France F-92195 Paris, DESPA, F-92195 Meudon, France Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA Univ Calif Berkeley Berkeley CA USA 94720 Sci Lab, Berkeley, CA 94720 USA
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
fascicolo: A5, volume: 106, anno: 2001,
pagine: 8301 - 8313
SICI:
0148-0227(20010501)106:A5<8301:WWLWAS>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
CORONAL MASS EJECTION; III RADIO-BURST; JANUARY 1997; SOLAR-WIND; INTERPLANETARY SHOCKS; SOURCE REGION; EVENT; RADIATION; EMISSIONS; ORIGIN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Moullard, O European Space Agcy, Estec, Dept Space Sci, Postbus 299, NL-2200 AG Noordwijk, Netherlands European Space Agcy Postbus 299 Noordwijk Netherlands NL-2200 AG
Citazione:
O. Moullard et al., "Whistler waves, Langmuir waves and single loss cone electron distributionsinside a magnetic cloud: Observations", J GEO R-S P, 106(A5), 2001, pp. 8301-8313

Abstract

Whistler waves propagating along the ambient magnetic field are observed within a coronal mass ejection (on January 10, 1997) associated in time withLangmuir waves and electron distributions of a single loss cone type. In addition, background observations are made on the plasma wave activity in the sheath and foreshock regions that precede the magnetic cloud, on the observed radio emissions (including a type IJ, radio burst) and on the geometryof the cloud. All the data comes from the WIND spacecraft. The whistler waves are identified using full magnetic waveforms while possible evidence ofcoexisting parallel, and antiparallel propagating Langmuir modes are foundin the waveform and spectral wave data from the WAVES experiment. A few hundred low energy electron distributions from the Three-Dimensional Plasma (3DP) experiment are investigated. Finally, we tentatively suggest that thistype of plasma wave particle activity is linked to the type II emission observed, i.e., that the emission mechanisms are proceeding and taking place within the magnetic cloud instead of at the shock region as usually thought. The extra suprathermal electrons could source from electrons accelerated at reconnection sites between the magnetic cloud and the ambient interplanetary magnetic field. A linear instability study using observed properties of the electron distributions is to be presented in a following paper.

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Documento generato il 02/07/20 alle ore 23:20:30