Abstract
The members learned with regret of the deaths of L. G. Henyey, J. Q. Stewart and M. H. Wrubel since the last General Assembly. The following additions were made to the Report of the Commission: A-l: - A set of models for F stars has been published by T. Kipper. A-8: - The nature of P Cygni stars has been discussed by L. Luud. C-4: - A more exact equation of radiative transfer has been derived from the basic equations of quantum electrodynamics by A. Sapar who has discussed the implications in detail. Computational techniques for plane-parallel radiative transfer based on mathematical semigroup properties of the operators for diffuse reflection and transmission in scattering atmospheres have been developed by Grant and Hunt. C-7: - Problems of extended stellar atmospheres and of stationary mass loss are being studied by Pustylnik and by Sapar and Viik. In addition analytical expressions for the redistributed intensity as a result of multiple Compton scattering in a spherical atmosphere is under study by Viik. As with the work reported previously, reference must be made to standard abstracting journals to find where these studies are published.
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© 1971 International Astronomical Union
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Underhill, A.B., Powell, A.L.T. (1971). Theory of Stellar Atmospheres (Théorie des Atmosphères Stellaires). In: De Jager, C., Jappel, A. (eds) Transactions of the International Astronomical Union. International Council of Scientific Unions / International Astronomical Union / Union Astronomique Internationale, vol 14B. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-3105-9_32
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DOI: https://doi.org/10.1007/978-94-010-3105-9_32
Publisher Name: Springer, Dordrecht
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