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Atmospheres of AGB Stars

  • Bengt Gustafsson
  • Susanne Höfner
Part of the Astronomy and Astrophysics Library book series (AAL)

Abstract

The use of the term atmosphere for the outer layers of a star is not obvious. The atmosphere of a terrestrial planet is easily defined as the gaseous envelope extending from the crust (or ocean) out into free space. For stars, the lower boundary is less easily defined. For AGB stars, the outer boundary is not well defined either: How far out into the stellar wind or circumstellar envelope (CSE) should we apply the term atmosphere? A possibly stricter definition, applied by many practitioners in this field, is to define the atmosphere as the stellar region visible from the outside. The atmosphere would then be the region where most of the electromagnetic emission that is observed in the stellar spectrum originates.1

Keywords

Radiation Pressure Stellar Wind Local Thermodynamical Equilibrium Stellar Atmosphere Carbon Star 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 2004

Authors and Affiliations

  • Bengt Gustafsson
    • 1
  • Susanne Höfner
    • 1
  1. 1.Department of Astronomy and Space PhysicsUppsala UniversitySweden

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