Abstract We present numerical simulations in 3D settings where coronal rain phenomena take place in a magnetic configuration of a quadrupolar arcade system. Our simulation is a magnetohydrodynamic simulation including anisotropic thermal conduction, optically thin radiative losses, and parametrised heating as main thermodynamical features to construct a realistic arcade configuration from chromospheric to coronal heights. The plasma evaporation from chromospheric and transition region heights eventually causes localised runaway condensation events and we witness the formation of plasma blobs due to thermal instability, that evolve dynamically in the heated arcade part and move gradually downwards due to interchange type dynamics. Unlike earlier 2.5D simulations, in this case there is no large scale prominence formation observed, but a continuous coronal rain develops which shows clear indications of Rayleigh–Taylor or interchange instability, that causes the denser plasma located above the transition region to fall down, as the system moves towards a more stable state. Linear stability analysis is used in the non-linear regime for gaining insight and giving a prediction of the system’s evolution. After the plasma blobs descend through interchange, they follow the magnetic field topology more closely in the lower coronal regions, where they are guided by the magnetic dips.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Simulating coronal condensation dynamics in 3D


    Contributors:
    Moschou, S.P. (author) / Keppens, R. (author) / Xia, C. (author) / Fang, X. (author)

    Published in:

    Advances in Space Research ; 56 , 12 ; 2738-2759


    Publication date :

    2015-05-07


    Size :

    22 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Simulating coronal condensation dynamics in 3D

    Moschou, S.P | Online Contents | 2015


    Coronal dynamics and heating theories

    Gudiksen, Boris V. | Online Contents | 2009


    Coronal dynamics and heating theories

    Gudiksen, Boris V. | Elsevier | 2008


    DYNAMICS OF CORONAL LOOP OSCILLATIONS

    Van Doorsselaere, T. / Arregui, I. / Andries, J. et al. | British Library Conference Proceedings | 2005


    The coronal dynamics imagers for the KuaFu mission

    Vives, S. | Online Contents | 2008