On the nature of reconnection at a solar coronal null point above a separatrix dome

D. I. Pontin (Lead / Corresponding author), E. R. Priest, Klaus Galsgaard

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    53 Citations (Scopus)

    Abstract

    Three-dimensional magnetic null points are ubiquitous in the solar corona and in any generic mixed-polarity magnetic field. We consider magnetic reconnection at an isolated coronal null point whose fan field lines form a dome structure. Using analytical and computational models, we demonstrate several features of spine-fan reconnection at such a null, including the fact that substantial magnetic flux transfer from one region of field line connectivity to another can occur. The flux transfer occurs across the current sheet that forms around the null point during spine-fan reconnection, and there is no separator present. Also, flipping of magnetic field lines takes place in a manner similar to that observed in the quasi-separatrix layer or slip-running reconnection.
    Original languageEnglish
    Article number154
    Number of pages10
    JournalAstrophysical Journal
    Volume774
    Issue number2
    DOIs
    Publication statusPublished - 10 Sep 2013

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