The plane of polarization of the solar corona during eclipse observations

Details The plane of polarization of the solar corona during eclipse observations The plane of polarization of the solar corona during eclipse observations

Mar 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999arep...43..198k&link_type=abstract

Astronomy Reports, Volume 43, Issue 3, March 1999, pp.198-204

Astronomy and Astrophysics

Astronomy

Scientific paper

Analyses of the orientation of the plane of polarization for the solar corona are presented, based on polarization isophotes of the solar eclipses of June 30, 1973 (Africa), November 3, 1994 (Brazil), and March 9, 1997 (Eastern Siberia). Deviations of the polarization plane from the radial direction, indeed, exist at distances from the solar limb greater than 0.5 R_solar. These deviations cannot be explained by the aberration of scattered photons on moving coronal electrons or by F-corona emission. It is proposed that the deviations are produced by sky polarization (the auroral ring), i.e., by Rayleigh scattering in the Earth's atmosphere during the eclipse. A model of the total emission of the corona taking into account the sky background is constructed, and the positions of singular points of the polarization tensor with topological index -1/2 are indicated.

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