Skip to content


  • Article
  • Open Access

Three-dimensional reconnection on the Sun

Earth, Planets and Space201453:BF03353259

  • Received: 1 May 2000
  • Accepted: 1 November 2000
  • Published:


A brief review is given of the theory of magnetic reconnection in three dimensions. The key elements of a three-dimensional null point are its spine and its fan, which consist, respectively, of a field line and a surface of field lines that pass through the null. The fans of two nulls intersect in general in a field line called a separator that joins the nulls. Several different types of reconnection have been proposed, namely: spine reconnection, fan reconnection, separator reconnection and quasi-separatrix layer reconnection. In addition, a new exact solution for reconnective annihilation has been recently discovered. A summary is also given of the impressive evidence of reconnection at work on the Sun provided by a range of observations from the Yohkoh and SOHO satellites, both of solar flares and of coronal heating events.


  • Current Sheet
  • Magnetic Reconnection
  • Null Point
  • Separatrix Surface
  • Ephemeral Region