Paper:	Exceeding the Eddington Limit
Volume:	332, The Fate of the Most Massive Stars
Page:	180
Authors:	Shaviv, N.
Abstract:	We review the current theory describing the existence of steady state super-Eddington atmospheres. The key to the understanding of these atmospheres is the existence of a porous layer responsible for a reduced effective opacity. We show how porosity arises from radiative-hydrodynamic instabilities and why the ensuing inhomogeneities reduce the effective opacity. We then discuss the appearance of these atmospheres. In particular, one of their fundamental characteristic is the continuum driven acceleration of a thick wind from regions where the inhomogeneities become transparent. We end by discussing the role that these atmospheres play in the evolution of massive stars.

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