The Nature of the Radiative Hydrodynamic Instabilities in Radiatively Supported Thomson Atmospheres

  title={The Nature of the Radiative Hydrodynamic Instabilities in Radiatively Supported Thomson Atmospheres},
  author={Nir J. Shaviv},
  journal={The Astrophysical Journal},
  pages={1093 - 1110}
  • N. Shaviv
  • Published 20 October 2000
  • Physics, Environmental Science
  • The Astrophysical Journal
Atmospheres having a significant radiative support are shown to be intrinsically unstable at luminosities above a critical fraction Γcrit ≈ 0.5-0.85 of the Eddington limit, with the exact value depending on the boundary conditions. Two different types of absolute radiation-hydrodynamic instabilities of acoustic waves are found to take place even in the electron scattering-dominated limit. Both instabilities grow over dynamical timescales and both operate on nonradial modes. One is stationary… 

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