Departures from radiative equilibrium in stellar atmospheres grey absorption

Details Departures from radiative equilibrium in stellar atmospheres grey absorption Departures from radiative equilibrium in stellar atmospheres grey absorption

Jul 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26a....67..301c&link_type=abstract

Astronomy and Astrophysics, vol. 67, no. 3, July 1978, p. 301-309.

Astronomy and Astrophysics

Astrophysics

6

Atmospheric Circulation, Atmospheric Temperature, Radiative Transfer, Stellar Atmospheres, Atmospheric Models, Chromosphere, Temperature Distribution, Thermodynamic Equilibrium

Scientific paper

Some of the consequences of departures from radiative equilibrium in stellar atmospheres are discussed. Using a discrete-ordinate method the radiative-transfer equation in a grey atmosphere subjected to a specified distribution of mechanical heating is solved, and the resulting temperature changes in LTE and non-LTE conditions are determined. It is shown how radiative transfer leads to temperature changes in regions that are not directly heated and how non-LTE effects lead to an amplification of the temperature rise produced by a given distribution of heating. An attempt is made to resolve a controversy surrounding the estimation of excess radiative losses in the solar chromosphere.

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