Optical polarization observations of the solar corona during the total solar eclipse of 1991 July 11

Details Optical polarization observations of the solar corona during the total solar eclipse of 1991 July 11 Optical polarization observations of the solar corona during the total solar eclipse of 1991 July 11

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pasj...44l.221t&link_type=abstract

PASJ: Publications of the Astronomical Society of Japan (ISSN 0004-6264), vol. 44, no. 5, p. L221-L226.

Astronomy and Astrophysics

Astronomy

5

Interplanetary Dust, Optical Polarization, Solar Corona, Solar Eclipses, Interplanetary Medium, Solar Atmosphere

Scientific paper

We report on the results of optical polarization observations of the outer solar corona during the total solar eclipse of July 11, 1991, with specially designed telescopes. The observations were carried out near the summit of Mt. Popocatepetl in Mexico at an altitude of 5250 m. Polarization vector maps around the Sun were obtained at wavelengths of 532.5, 596.5, 720.0, and 801.5 nm. Strong polarization was observed in the regions where coronal streamers dominate and is thought to be due to Thomson scattering by free electrons. No excess polarization was observed at around 4-5 solar radii from the Sun on the ecliptic plane.

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