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Diffusion and Its Manifestation in Stellar Atmospheres

  • Tatiana Ryabchikova
Chapter
Part of the GeoPlanet: Earth and Planetary Sciences book series (GEPS)

Abstract

A short introduction to the diffusion process under mutual action of radiation acceleration and gravitational settling is given. In a stable stellar atmosphere diffusion develops significant abundance gradients (chemical stratification). The effects of stratification appear as changes in the observed spectral characteristics that are considered in the lecture.

Keywords

Diffusion Stars: atmospheres Stars: fundamental parameters  Stars: abundances Stars: chemically peculiar 

Notes

Acknowledgments

This work was partially supported by Praesidium RAS Program “Nonstationary Phenomena in Objects of the Universe”.

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  1. 1.Institute of Astronomy, Russian Academy of SciencesMoscowRussia

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