Magnetic reconnection solutions in the presence of multiple nulls

Citation
Ijd. Craig et al., Magnetic reconnection solutions in the presence of multiple nulls, ASTROPHYS J, 523(2), 1999, pp. 838-848
Citations number
19
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICAL JOURNAL
ISSN journal
0004637X → ACNP
Volume
523
Issue
2
Year of publication
1999
Part
1
Pages
838 - 848
Database
ISI
SICI code
0004-637X(19991001)523:2<838:MRSITP>2.0.ZU;2-4
Abstract
It is known that exact analytic solutions can be constructed for incompress ible magnetic reconnection in three space dimensions. In the case of an iso lated X-point null, there are two types of reconnection solutions, namely, "spine" and "fan" models, which depend on the form of the X-point disturban ce. However, such models cannot describe multiple null "separator" reconnec tion, for which there is independent observational evidence. Here we show t hat the spine formalism naturally extends to the case of multiple null fiel ds. Solutions showing the characteristics of fan, spine, and separator are described, and a discussion is given of their energy dissipation properties . We demonstrate a family of multiple null, fast reconnection solutions and point out that the classical Sweet-Parker dissipation rate is the slowest that can be achieved with the present models.