Journal articles
Observation of a New Type of Low Frequency Waves at Comet 67P/Churyumov-Gerasimenko
I. Richter
1
C. Koenders
1
H. -U. Auster
1
D. Fruehauff
1
C. Goetz
1
P. Heinisch
1
C. Perschke
2, 1
U. Motschmann
2
B. Stoll
1
Kathrin Altwegg
3
J. Burch
4
C. Carr
5
E. Cupido
5
A. Eriksson
6
Pierre Henri
7
R. Goldstein
4
Jean-Pierre Lebreton
7
P. Mokashi
4
Z. Nemeth
8
H. Nilsson
6
M. Rubin
3
K. Szegoe
8
B. T. Tsurutani
9
C. Vallat
10
M. Volwerk
11
K. -H. Glassmeier
1
M. Volwerk 11
Author
K. -H. Glassmeier 1
Author
1
IGEP - Institut für Geophysik und Extraterrestrische Physik [Braunschweig] (Mendelssohnstr. 3, D-38106 Braunschweig - Germany)
- Technische Universität Braunschweig [Braunschweig] (38092 Braunschweig - Germany)
2
Institut für Theoretische Physik [Braunschweig] (Mendelssohnstr. 3, 38106 Braunschweig - Germany)
- Technische Universität Braunschweig [Braunschweig] (38092 Braunschweig - Germany)
3
Physikalisches Institut [Bern] (Sidlerstr. 5, 3012 Bern - Switzerland)
- Universität Bern [Bern] (Hochschulstrasse 4 - CH-3012 Bern - Switzerland)
4
SwRI - Southwest Research Institute [San Antonio] (6220 Culebra Rd, San Antonio, TX 78238 - United States)
5
Blackett Laboratory (Prince Consort Road, South Kensington, London SW7 2AZ - United Kingdom)
- Imperial College London (South Kensington Campus, London SW7 2AZ - United Kingdom)
6
IRF - Swedish Institute of Space Physics [Uppsala] (Box 537 SE-751 21 Uppsala - Sweden)
7
LPC2E - Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (3A, Avenue de la Recherche Scientifique 45071 Orléans cedex 2 - France)
- OSUC - Observatoire des Sciences de l'Univers en région Centre : UMS3116 (Campus Géosciences, 1A rue de la Férollerie, 45071 Orléans - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- Observatoire de Paris (61 Av de l'Observatoire 75014 PARIS - France)
- PSL - PSL Research University (France)
- UO - Université d'Orléans (Château de la Source - Avenue du Parc Floral - BP 6749 - 45067 Orléans cedex 2 - France)
- CNRS - Centre National de la Recherche Scientifique : UMS3116 (France)
- CNES - Centre National d’Études Spatiales [Paris] : UMR 7328 (Siège social : 2 place Maurice Quentin, 75039 Paris - France)
8
Wigner Research Centre for Physics [Budapest] (1121 Budapest
Konkoly-Thege Miklós út 29-33. - Hungary)
- MTA - Hungarian Academy of Sciences (Széchenyi István sqr. 9, 1051 Budapest - Hungary)
9
JPL - Jet Propulsion Laboratory (4800 Oak Grove Drive, Pasadena, CA 91109-8099, USA - United States)
- NASA (www.nasa.gov - United States)
- CALTECH - California Institute of Technology (1200 East California Blvd, Pasadena, California 91125 - United States)
10
European Space Astronomy Centre - Rosetta Science Ground Segment (Spain)
- ESA - European Space Agency (France)
11
IWF - Space Research Institute of Austrian Academy of Sciences (Schmiedlstraße 6, 8042 Graz - Austria)
- OeAW - Austrian Academy of Sciences (Doktor-Ignaz-Seipel-Platz 2, 1010 Wien - Austria)
Abstract : We report on magnetic field measurements made in the innermost coma of 67P/Churyumov-Gerasimenko in its low activity state. Quasi-coherent, large-amplitude ($\delta B/B \sim 1$), compressional magnetic field oscillations at $\sim$ 40 mHz dominate the immediate plasma environment of the nucleus. This differs from previously studied comet-interaction regions where waves at the cometary ion gyro-frequencies are the main feature. Thus classical pick-up ion driven instabilities are unable to explain the observations. We propose a cross-field current instability associated with newborn cometary ion currents as a possible source mechanism.
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Journal articles
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https://hal-insu.archives-ouvertes.fr/insu-01352452
Contributor : Nathalie Pothier <>
Submitted on : Tuesday, October 25, 2016 - 1:18:07 PM
Last modification on : Wednesday, August 5, 2020 - 2:32:02 PM
Contributor : Nathalie Pothier <>
Submitted on : Tuesday, October 25, 2016 - 1:18:07 PM
Last modification on : Wednesday, August 5, 2020 - 2:32:02 PM
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angeo-33-1031-2015.pdf
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Identifiers
- HAL Id : insu-01352452, version 1
- DOI : 10.5194/angeo-33-1031-2015
- ARXIV : 1505.06068
Citation
I. Richter, C. Koenders, H. -U. Auster, D. Fruehauff, C. Goetz, et al.. Observation of a New Type of Low Frequency Waves at Comet 67P/Churyumov-Gerasimenko. Annales Geophysicae, European Geosciences Union, 2015, 33 (8), pp.1031-1036. ⟨10.5194/angeo-33-1031-2015⟩. ⟨insu-01352452⟩
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