An ambiguity-free determination of J_Z in solar active regions

Details An ambiguity-free determination of J_Z in solar active regions An ambiguity-free determination of J_Z in solar active regions

Mar 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...331..383s&link_type=abstract

Astronomy and Astrophysics, v.331, p.383-391 (1998)

Astronomy and Astrophysics

Astrophysics

21

Sun: Magnetic Fields, Plages, Sunspots

Scientific paper

We propose a way to derive a radial electric current density from vector magnetograms that is free of any particular choice of the two possible azimuths for the plane of the sky field. The method is applied to active region data obtained with the Advanced Stokes Polarimeter (ASP). A comparison of this current density with that derived for two particular sets of possible azimuth assignments allows one to evaluate the appropriateness of each set. In addition one may verify the detection of currents in general and the occurrence of current sheets, i.e. field discontinuities, in particular.

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