On the Disagreement between Atmospheric and Coronal Electron Densities

Details On the Disagreement between Atmospheric and Coronal Electron Densities On the Disagreement between Atmospheric and Coronal Electron Densities

Aug 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999apj...521l.145e&link_type=abstract

The Astrophysical Journal, Volume 521, Issue 2, pp. L145-L148.

Astronomy and Astrophysics

Astronomy

9

Sun: Solar Wind, Sun: Atmosphere, Sun: Corona

Scientific paper

Electron densities in the lower solar atmosphere (photosphere and chromosphere) are derived using a number of different atmospheric models which are constrained by observed spectral lines. Comparing these atmospheric densities to coronal electron densities derived from polarization brightness measurements in the region from about 1.1 to several solar radii, it is shown that there is a discrepancy between the two sets of densities. The atmospheric electron densities are in agreement with a density of maximum 10^7 cm^-3 at 1.1 R_solar. The polarized brightness densities given in the literature are typically 5x10^7 cm^-3 or higher. It is shown that this discrepancy might be due to an overestimation of the coronal electron densities below 1.5-2 R_solar.

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