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dc.contributor.authorWheatland, M.S.
dc.contributor.authorCraig, Ian J.D.
dc.date.accessioned2008-11-18T22:19:41Z
dc.date.available2008-11-18T22:19:41Z
dc.date.issued2003-09
dc.identifier.citationWheatland, M. S. & Craig, I. J. D. (2003). Toward a reconnection model for solar flare statistics. The Astrophysical Journal, 595 (1), 458- 464.en_US
dc.identifier.urihttps://hdl.handle.net/10289/1382
dc.description.abstractA model to account for observed solar flare statistics in terms of a superposition of independent random flaring elements (assumed to be sites of magnetic reconnection in the coronal magnetic field and hence termed “separators”) is described. A separator of length is assumed to flare as a Poisson process in time, with a rate v(l) inversely proportional to the Alfvén transit time for the structure. It is shown that a relationship ξ∞lk between the mean energy of events ξ at a separator and the separator length implies a relationship E∞Tk between individual waiting times τ and energies E of events at the separator. The most plausible K=2 model is found to be compatible with simple pictures for magnetohydrodynamic energy storage prior to magnetic reconnection in a current sheet with anomalous (turbulent) resistivity. Formal inversion of the observed flare frequency-energy distribution is shown to imply a distribution P(l) ∞l-1 of the separator lengths in active regions. A simulation confirms the basic results of the model. It is also demonstrated that a model comprising time-dependent separator numbers N=N(t) can reproduce an observed power-law tail in the flare waiting-time distribution, for large waiting times.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherAmerican Astronomical Societyen_NZ
dc.relation.urihttp://www.journals.uchicago.edu/doi/abs/10.1086/377254en_US
dc.rightsThis article has been published in the Astrophysical Journal. Copyright 2003 The American Astronomical Society.en_US
dc.subjectMHD—sunen_US
dc.subjectactivity—sunen_US
dc.subjectcorona—sunen_US
dc.subjectflares—sunen_US
dc.subjectmagnetic fieldsen_US
dc.titleToward a reconnection model for solar flare statisticsen_US
dc.typeJournal Articleen_US
dc.identifier.doi10.1086/377254en_US
dc.relation.isPartOfThe Astrophysical Journalen_NZ
pubs.begin-page458en_NZ
pubs.editionSeptemberen_NZ
pubs.elements-id29445
pubs.end-page464en_NZ
pubs.issue20en_NZ
pubs.volume595en_NZ


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