A comparison of photospheric electric current and ultraviolet and X-ray emission in a solar active region

Details A comparison of photospheric electric current and ultraviolet and X-ray emission in a solar active region A comparison of photospheric electric current and ultraviolet and X-ray emission in a solar active region

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...300..428h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 300, Jan. 1, 1986, p. 428-437.

Astronomy and Astrophysics

Astronomy

12

Electric Current, Emission Spectra, Photosphere, Solar Activity, Solar X-Rays, Ultraviolet Spectra, Current Density, Lyman Alpha Radiation, Solar Magnetic Field, Spaceborne Astronomy, Spectroheliographs, Vertical Distribution

Scientific paper

This paper presents an extensive set of coordinated observations of a solar active region, taking into account spectroheliograms obtained with the aid of the Solar Maximum Mission (SMM) Ultraviolet Spectrometer Polarimeter (UVSP) instrument, SMM soft X-ray polychromator (XRP) raster maps, and high spatial resolution ultraviolet images of the sun in Lyman-alpha and in the 1600 A continuum. These data span together the upper solar atmosphere from the temperature minimum to the corona. The data are compared to maps of the inferred photospheric electric current derived from the Marshall Space Flight Center (MSFC) vector magnetograph observations. Some empirical correlation is found between regions of inferred electric current density and the brightest features in the ultraviolet continuum and to a lesser extent those seen in Lyman-alpha within an active region.

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