The solar corona during the solar eclipse of February 16, 1980 - Density, temperature and expansion velocity

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Photometry, Electron Density (Concentration), Solar Corona, Solar Eclipses, Solar Temperature, Electromagnetic Fields, Equations Of Motion, Solar Wind, Wind Velocity

Scientific paper

The analysis of the photometric measurements of the white-light corona using the equations of motion of coronal gas disclosed that the classical determination of the electron density from eclipse observations, assuming a spherically symmetric and homogeneous corona, leads to principal variances in the physical interpretation of the results. These can be partly overcome if one assumes that the expansion of matter takes places in narrow rays whose diameters at first decrease with height (approximately to a distance of three solar radii) and then increase. The behaviour of the electron density, temperature, flow speed and diameter of the ray are determined.

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