Plage magnetic field strengths from near-infrared spectra.

Details Plage magnetic field strengths from near-infrared spectra. Plage magnetic field strengths from near-infrared spectra.

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991sopo.work..361r&link_type=abstract

Solar Polarimetry, Proceedings of the 11th Sacramento Peak Summper Workshop. Edited by L.J. November. Sunspot, NM: National Sola

Computer Science

4

Scientific paper

The authors have measured magnetic field strenghts in a small sample of plages from Stokes V spectra of two Zeeman-sensitive iron lines near 6388 cm-1(1.565 μm). The detected fields are strong (≡103gauss), but their strength varies significantly from feature to feature. The individual σ-components are broader than an average quiet-Sun line profile; if this broadening is primarily magnetic, there is typically about a 20% range in field strength within a 2-arcsecond resolution element. These observations represent the first stage of a project to build a near-infrared magnetograph that will produce two-dimensional maps of local magnetic field strength in the low photosphere.

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