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    Birth of a comet magnetosphere: A spring of water ions

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    Nilsson(2015a).pdf (1.714Mb)
    Authors
    Nilsson, H.
    Stenberg Wieser, G.
    Behar, E.
    Simon Wedlund, C.
    Gunell, H.
    Yamauchi, M.
    Lundin, R.
    Barabash, S.
    Wieser, M.
    Carr, C.
    Cupido, E.
    Burch, J.L.
    Fedorov, A.
    Sauvaud, J.-A.
    Koskinen, H.
    Kallio, E.
    Lebreton, J.-P.
    Eriksson, A.
    Edberg, N.
    Goldstein, R.
    Henri, P.
    Koenders, C.
    Mokashi, P.
    Nemeth, Z.
    Richter, I.
    Szego, K.
    Volwerk, M.
    Vallat, C.
    Rubin, M.
    Show allShow less
    Discipline
    Physical sciences
    Subject
    water
    astronomy
    comet
    ion exchange
    magnetosphere
    solar wind
    alpha radiation
    Article
    astronomy
    atmosphere
    electric field
    gravity
    high temperature
    ion current
    magnetic field
    particle size
    priority journal
    ultraviolet radiation
    Audience
    Scientific
    Date
    2015
    Metadata
    Show full item record
    Description
    The Rosetta mission shall accompany comet 67P/Churyumov-Gerasimenko from a heliocentric distance of >3.6 astronomical units through perihelion passage at 1.25 astronomical units, spanning low and maximum activity levels. Initially, the solar wind permeates the thin comet atmosphere formed from sublimation, until the size and plasma pressure of the ionized atmosphere define its boundaries: A magnetosphere is born. Using the Rosetta Plasma Consortium ion composition analyzer, we trace the evolution from the first detection of water ions to when the atmosphere begins repelling the solar wind (~3.3 astronomical units), and we report the spatial structure of this early interaction. The near-comet water population comprises accelerated ions (<800 electron volts), produced upstream of Rosetta, and lower energy locally produced ions; we estimate the fluxes of both ion species and energetic neutral atoms.
    Citation
    Nilsson, H.; Stenberg Wieser, G.; Behar, E.; Simon Wedlund, C.; Gunell, H.; Yamauchi, M.; Lundin, R.; Barabash, S.; Wieser, M.; Carr, C.; Cupido, E.; Burch, J.L.; Fedorov, A.; Sauvaud, J.-A.; Koskinen, H.; Kallio, E.; Lebreton, J.-P.; Eriksson, A.; Edberg, N.; Goldstein, R.; Henri, P.; Koenders, C.; Mokashi, P.; Nemeth, Z.; Richter, I.; Szego, K.; Volwerk, M.; Vallat, C.; Rubin, M. (2015). Birth of a comet magnetosphere: A spring of water ions. , Science, Vol. 347, Issue 6220, A0571, DOI: 10.1126/science.aaa0571.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/2707
    doi: http://dx.doi.org/10.1126/science.aaa0571
    scopus: 2-s2.0-84921808746
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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