Dual Height Spectropolarimetry Observations of Active Region NOAA 9662

Details Dual Height Spectropolarimetry Observations of Active Region NOAA 9662 Dual Height Spectropolarimetry Observations of Active Region NOAA 9662

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsp31b..06c&link_type=abstract

American Geophysical Union, Spring Meeting 2008, abstract #SP31B-06

Physics

7507 Chromosphere, 7524 Magnetic Fields, 7529 Photosphere

Scientific paper

We present the results of the spectropolarimetry observations of active region NOAA 9664 observed in spectral lines FeI 6302 and Mgb2 5872 A. These spectral lines originate at photospheric and lower chromospheric heights of solar atmosphere, respectively. The active region was situated near the disk center at the time of our observations. Among several interesting features, we observe three compact, down-flow regions (each about two seconds in size) which are near the magnetic neutral line. The Stokes V profiles at these locations are normal in chromosphere but anomalous in photosphere. The corresponding Stokes I profiles are symmetric in chromosphere and highly asymmetric in the photosphere. We present the results of bisector analysis of these profiles and discuss their significance in the evolution of sunspot structure.

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