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    MHD and kinetic aspects in solar wind modeling

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    Moschou(2016b).pdf (362.5Kb)
    Authors
    Moschou, S.P.
    Pierrard, V.
    Keppens, R.
    Pomoell, J.
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    Discipline
    Physical sciences
    Subject
    Boundary conditions
    Distribution functions
    Kinetics
    Magnetohydrodynamics
    Magnetoplasma
    Sun
    Wind
    Heliocentric distances
    Kinetic description
    Kinetic treatment
    Macroscopic variables
    Plasma characteristics
    Solar wind acceleration
    Solar wind parameters
    Suprathermal electrons
    Solar wind
    Audience
    Scientific
    Date
    2016
    Metadata
    Show full item record
    Description
    We present solar wind modeling efforts with both magnetohydrodynamic (MHD) and kinetic treatments. An observation-driven MHD model is used to constrain a kinetic solar wind model with anisotropic kappa velocity distribution functions (VDF) for the electrons. Photospheric magnetograms serve as observational input in semi-empirical coronal models for estimating the plasma characteristics up to a heliocentric distance of 0.1AU. A full MHD model is employed for computing the three-dimensional evolution of the solar wind macroscopic variables up to 2AU. The results of the MHD model obtained at 0.1AU serve to constrain the parameters used in an exospheric kinetic solar wind model. The assumption of Maxwell and kappa VDF at the exobase, for protons and electrons respectively, is used to determine the solar wind solution using appropriate boundary conditions, estimated to obtain the best comparison with available observations at the Earth. The kinetic description sheds light on processes such as coronal heating and solar wind acceleration, that naturally appear by inclusion of suprathermal electrons in the model. We are focusing on the profile and variation of solar wind parameters, such as the solar wind speed, temperature and density at 1 AU, on characterizing the slow and fast source regions of the wind and on comparing its features with results of exospheric models in similar conditions. In order to compare MHD and kinetic approaches with observations, we start from similar boundary conditions at the 0.1AU and propagate the global kinetic solution up to 2AU.
    Citation
    Moschou, S.P.; Pierrard, V.; Keppens, R.; Pomoell, J. (2016). MHD and kinetic aspects in solar wind modeling. (Mantica, P., Ed.), EPS 2016 43rd European Physical Society Conference on Plasma Physics, Vol. 40A, 433-436,
    Identifiers
    isbn: 978-1-5108-2947-3
    uri: https://orfeo.belnet.be/handle/internal/4893
    scopus: 2-s2.0-85013922522
    Type
    Conference
    Peer-Review
    No
    Language
    eng
    Links
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