Global constant-alpha force-free magnetic fields and coronal structures

Details Global constant-alpha force-free magnetic fields and coronal structures Global constant-alpha force-free magnetic fields and coronal structures

Sep 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26a....69...43n&link_type=abstract

Astronomy and Astrophysics, vol. 69, no. 1, Sept. 1978, p. 43-49.

Astronomy and Astrophysics

Astronomy

6

Force-Free Magnetic Fields, Solar Corona, Solar Magnetic Field, Topology, Electric Current, Lines Of Force, Magnetic Dipoles, Magnetic Field Configurations, Multipoles, Quadrupoles, Skylab Program, X Ray Astronomy

Scientific paper

Nakagawa's (1973) general formulation of constant-alpha global force-free magnetic fields is used to examine the topological characteristics of axisymmetric constant-alpha fields with specific reference to solar EUV, XUV, and X-ray structures observed from Skylab. The theoretical formulation is briefly summarized, and topological characteristics of the field lines are analyzed. The results are compared with X-ray observations of a large coronal arch and white-light observations of a coronal transient. It is concluded that global-scale force-free magnetic fields are present in the solar atmosphere and that their topological characteristics differ significantly from those of potential fields.

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