Electric currents and coronal heating in NOAA active region 6952

Details Electric currents and coronal heating in NOAA active region 6952 Electric currents and coronal heating in NOAA active region 6952

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...428..860m&link_type=abstract

The Astrophysical Journal, vol. 428, no. 2, pt. 1, p. 860-866

Mathematics

Logic

28

Brightness, Coronas, Electric Current, Gamma Rays, Heating, Photosphere, Sun, X Ray Imagery, X Rays, High Resolution, Magnetic Signatures, Polarimeters, Resistance Heating, X Ray Telescopes

Scientific paper

We examine the spatial and temporal relationship between coronal structures observed with the soft X-ray telescope (SXT) on board the Yohkoh spacecraft and the vertical electric current density derived from photospheric vector magnetograms obtained using the Stokes Polarimeter at the Mees Solar Observatory. We focus on a single active region: AR 6952 which we observed on 7 days during 1991 December. For 11 independent maps of the vertical electric current density co-aligned with non-flaring X-ray images, we search for a morphological relationship between sites of high vertical current density in the photosphere and enhanced X-ray emission in the overlying corona. We find no compelling spatial or temporal correlation between the sites of vertical current and the bright X-ray structures in this active region.

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