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dc.contributor.author Brown, Daniel
dc.contributor.author Priest, Eric
dc.date.accessioned 2007-01-16T13:47:36Z
dc.date.available 2007-01-16T13:47:36Z
dc.date.issued 2001-02-03
dc.identifier.citation Brown , D & Priest , E 2001 , ' The topological behaviour of 3D null points in the Sun's corona ' Astronomy and Astrophysics , vol 367 , no. 1 , pp. 339-346 . , 10.1051/0004-6361:20010016 en
dc.identifier.issn 0004-6361
dc.identifier.other PURE: 71710
dc.identifier.other dspace: 2160/297
dc.identifier.uri http://hdl.handle.net/2160/297
dc.identifier.uri http://www.aanda.org/articles/aa/pdf/2001/07/aah2357.pdf en
dc.description Brown D. S. and Priest E. R. 2001, The topological behaviour of 3D null points in the Sun's corona, Astronomy and Astrophysics, 367, 339-346 en
dc.description.abstract Many traditional two-dimensional models of flares and other reconnective events rely on an X-point in the corona which collapses to form a current sheet where reconnection takes place. However, the Sun's corona is three-dimensional and the X-point is only a two-dimensional artifact. Three-dimensional models can instead make use of 3D null points in the corona, and Priest & Titov (1996) have studied how reconnection may take place at such locations. This paper aims to study possible conditions for coronal nulls to occur, and how they can be born. It starts with three negative sources and a positive source that is weaker than the sum of the negative sources. As the positive source moves inwards towards the negative sources, there is a local double-separator bifurcation of the topology to a new state, referred to as a Coronal Null state, which contains a null point above the photosphere. en
dc.format.extent 8 en
dc.language.iso eng
dc.relation.ispartof Astronomy and Astrophysics en
dc.title The topological behaviour of 3D null points in the Sun's corona en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1051/0004-6361:20010016
dc.contributor.institution Institute of Mathematics & Physics (ADT) en
dc.contributor.institution Mathematics and Physics en
dc.description.status Peer reviewed en


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