Evidence for coronal expansion based on electron component data

Details Evidence for coronal expansion based on electron component data Evidence for coronal expansion based on electron component data

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988azh....65..403b&link_type=abstract

Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 65, Mar.-Apr. 1988, p. 403-413. In Russian.

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Magnetohydrodynamic Flow, Solar Corona, Solar Electrons, Solar Wind, Flow Velocity, Isothermal Processes, Thermal Conductivity

Scientific paper

The K-corona brightness and polarization were computed under the assumption of a hydrostatic density distribution in an isothermal corona. At distances greater than 2.5 solar radii from the disk center, the observed values of ln(Kt - Kr) deviate from the theoretical curve. Consideration is given to the following possible reasons for this deviation: the temperature change due to heat conductivity, the existence of a plasma outflow, and the simultaneous action of both. It is concluded that the solar wind-type outflow, which has a velocity exceeding the speed of sound at distances of about 5 solar radii, strongly influences the brightness distribution.

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