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Plasma waves confin...
Plasma waves confined to the diamagnetic cavity of comet 67P/Churyumov-Gerasimenko
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- Gunell, Herbert (author)
- Umeå universitet,Institutionen för fysik,Royal Belgian Institute for Space Aeronomy (BIRA-IASB), Avenue Circulaire 3, B-1180 Brussels, Belgium,Royal Belgian Inst Space Aeron BIRA IASB, Ave Circulaire 3, B-1180 Brussels, Belgium;Umea Univ, Dept Phys, SE-90187 Umea, Sweden
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- Goetz, C. (author)
- TU Braunschweig, Inst Geophys & Extraterr Phys, Mendelssohnstr 3, D-38106 Braunschweig, Germany,Royal Belgian Inst Space Aeron BIRA IASB, Ave Circulaire 3, B-1180 Brussels, Belgium
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- Eriksson, Anders I. (author)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
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- Nilsson, H. (author)
- Swedish Inst Space Phys, Box 812, SE-98128 Kiruna, Sweden
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- Wedlund, C. Simon (author)
- Univ Oslo, Dept Phys, Box 1048 Blindern, N-0316 Oslo, Norway
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- Henri, P. (author)
- CNRS, LPC2E, F-45071 Orleans, France
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- Maggiolo, R. (author)
- Royal Belgian Inst Space Aeron BIRA IASB, Ave Circulaire 3, B-1180 Brussels, Belgium,Univ Bern, Phys Inst, Sidlerstr 5, CH-3012 Bern, Switzerland
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- Hamrin, Maria, 1972- (author)
- Umeå universitet,Institutionen för fysik,Umea Univ, Dept Phys, SE-90187 Umea, Sweden
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- De Keyser, J. (author)
- Royal Belgian Inst Space Aeron BIRA IASB, Ave Circulaire 3, B-1180 Brussels, Belgium
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Rubin, M. (author)
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- Wieser, G. Stenberg (author)
- Swedish Inst Space Phys, Box 812, SE-98128 Kiruna, Sweden
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Cessateur, G. (author)
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- Dhooghe, F. (author)
- Royal Belgian Inst Space Aeron BIRA IASB, Ave Circulaire 3, B-1180 Brussels, Belgium
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- Gibbons, A. (author)
- Royal Belgian Inst Space Aeron BIRA IASB, Ave Circulaire 3, B-1180 Brussels, Belgium;Univ Libre Bruxelles, Lab Chim Quant & Photophys, 50 Ave FD Roosevelt, B-1050 Brussels, Belgium
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(creator_code:org_t)
- 2017-05-10
- 2017
- English.
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In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press. - 0035-8711 .- 1365-2966. ; 469, s. S84-S92
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
Close
- Ion acoustic waves were observed in the diamagnetic cavity of comet 67P/Churyumov-Gerasimenko by the Rosetta spacecraft on 2015 August 3, when the comet was 1.25 au from the Sun. Wave spectra recorded by the Langmuir probe (RPC-LAP), peak near 200 Hz, decrease for higher frequencies and reach the noise floor at approximately 1.5 kHz. These waves were observed only when the spacecraft was in the diamagnetic cavity or at its boundary, which is identified as a sharp drop in magnetic field magnitude, measured by RPC-MAG. The plasma, on both sides of the boundary, is dominated by a cold (a few hundred K) water group ion population, one cold (k(B)T(e) similar to 0.1 eV) and one warm (k(B)T(e) similar to 10 eV) electron population. The observations are interpreted in terms of current-driven ion acoustic waves, generated by currents that flow through bulges on the boundary of the diamagnetic cavity.
Subject headings
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Keyword
- plasmas
- waves
- methods: analytic
- methods: data analysis
- comets: individual: 67P/Churyumov-Gerasimenko
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Gunell, Herbert
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Goetz, C.
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Eriksson, Anders ...
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Nilsson, H.
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Wedlund, C. Simo ...
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Henri, P.
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Maggiolo, R.
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Hamrin, Maria, 1 ...
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De Keyser, J.
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Rubin, M.
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Wieser, G. Stenb ...
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Cessateur, G.
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Dhooghe, F.
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Gibbons, A.
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Fusion Plasma an ...
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Umeå University
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Uppsala University