Vertical gradients of sunspot magnetic fields

Details Vertical gradients of sunspot magnetic fields Vertical gradients of sunspot magnetic fields

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...84...13h&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 84, April 1983, p. 13-31.

Physics

32

Magnetic Field Configurations, Magnetic Flux, Solar Atmosphere, Solar Magnetic Field, Solar Maximum Mission, Sunspots, Line Of Sight, Photosphere, Polarimetry, Potential Fields, Solar Corona, Ultraviolet Spectra, Vertical Distribution

Scientific paper

The results of a Solar Maximum Mission (SMM) guest investigation to determine the vertical gradients of sunspot magnetic fields for the first time from coordinated observations of photospheric and transition-region fields are described. Descriptions are given of both the photospheric vector field of a sunspot, derived from observations using the NASA Marshall Space Flight Center vector magnetograph, and of the line-of-sight component in the transition region, obtained from the SMM Ultraviolet Spectrometer and Polarimeter instrument. On the basis of these data, vertical gradients of the line-of-sight magnetic field component are calculated using three methods. It is found that the vertical gradient of Bz is lower than values from previous studies and that the transition-region field occurs at a height of approximately 4000-6000 km above the photosphere.

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