Atmospheric Parameters and Accelerations in the Outer Parts of Luminous Hot Stars

  • Hans Nieuwenhuijzen
  • Cornelis de Jager
Conference paper
Part of the Astrophysics and Space Science Library book series (ASSL, volume 157)


In the atmospheres of the most extreme luminous stars, close to the Humphreys-Davidson limit, the inward gravitational acceleration is for a great part compensated by outward accelerations due to radiation pressure, turbulent pressure and dynamic pressure of the stellar winds. As a result the effective acceleration is very small, resulting in blown-up atmospheres that can no longer be considered plane-parallel or in hydrostatic equilibrium.


Dynamic Pressure Outer Part Radiation Pressure Gravitational Acceleration Stellar Wind 
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Copyright information

© Kluwer Academic Publishers 1989

Authors and Affiliations

  • Hans Nieuwenhuijzen
    • 1
  • Cornelis de Jager
    • 1
  1. 1.Astronomical Institute and Laboratory for Space ResearchUtrechtthe Netherlands

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