First Results from the Advanced Stokes Polarimeter

Details First Results from the Advanced Stokes Polarimeter First Results from the Advanced Stokes Polarimeter

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...180.1201l&link_type=abstract

American Astronomical Society, 180th AAS Meeting, #12.01; Bulletin of the American Astronomical Society, Vol. 24, p.747

Physics

Scientific paper

The Advanced Stokes Polarimeter (ASP) is a collaborative program between the High Altitude Observatory (HAO) and the National Solar Observatory (NSO) to investigate the physics of solar active regions though quantitative measurements of vector magnetic fields. First scientific results from the ASP were obtained during an observing run in March, 1992, when high resolution Stokes profile maps of active regions were obtained under good seeing conditions. The ASP measures simultaneously the full Stokes profiles in photospheric Fe I lines near 630 nm and in the temperature minimum/low chromospheric Mg I b-lines at 517 nm. We present scans of an isolated small sunspot near disk center, and we discuss the fine structure of the vector field within this sunspot and in the magnetic elements surrounding it. Observations of a complex active region near the east limb will also be presented. This active region produced a flare during the observational sequence.

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