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| Paper: |
Near IR Filter Linear Polarimetry in the Corona with a 4 m Aperture |
| Volume: |
463, 2nd ATST-EAST Workshop in Solar Physics: Magnetic Fields from the Photosphere to the Corona |
| Page: |
347 |
| Authors: |
Kim, I. S.; Popov, V. V.; Suyunova, E. Z. |
| Abstract: |
An approach for 2D linear polarimetry of the continuum corona
with actual accuracies of 1% in the polarization degree, p, and
1° in the polarization angle, χ, is briefly
described and is aimed at obtaining polarization “images”: 2D
distributions of p and χ. Several conditions must be met:
low sky brightness, low stray light in a telescope, uniformity of
polarizer parameters for any point of the image, “statistics”, the
special algorithm of data reduction based on Stokes vector
presentation. p– and χ–images of an Hα-prominence
are presented to illustrate the potential of the approach for
emission line objects. Prospects for the 2D linear polarimetry
with the 4 m aperture coronagraph in the near IR coronal line
Fe XIII 1074.7 nm are discussed. The required filter
width is estimated to be ≤ 1 Å for the line intensity of
2· 10–4. |
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