Waves at the plasma frequency inside magnetic holes: STEREO and Cluster observations

0353827 - ÚFA 2011 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Briand, C. - Souček, Jan - Mangeney, A. - Bale, D. - Goetz, K.
Waves at the plasma frequency inside magnetic holes: STEREO and Cluster observations.
Twelfth International Solar Wind Conference. Proceedings Paper. New York: Melville, 2010 - (Maksimovic, M.; Issautier, K.; Meyer-Vernet, N.; Moncuquet, M.; Pantellini, F.), s. 271-275. AIP Conference Proceedings, 1216. ISBN 978-0-7354-0759-6. ISSN 0094-243X.
[International Solar Wind Conference /12./. Saint-Milo (FR), 21.06.2009-26.06.2009]
Výzkumný záměr: CEZ:AV0Z30420517
Klíčová slova: solar wind * Langmuir waves * magnetic holes * STEREO * CLUSTER
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech

Magnetic isolated large amplitude depressions in the interplanetary magnetic field are commonly observed in the solar wind. Some of these magnetic structures are accompanied by bursts of electrostatic waves close to electron plasma frequency. Combining STEREO/WAVES and IMPACT data we are able to accurately localize the waves emission. We show that they also appear inside kinetic holes, themselves situated inside larger holes. We provide, for the first time, the detailed waveform of the waves that reveal their very bursty nature. These results are complemented by CLUSTER data, which allow to resolve the electron distribution and obtain a better description of spatio-temporal variations in Langmuir wave activity. Such observations are confronted to different emission mechanisms.
Trvalý link: http://hdl.handle.net/11104/0192961