4 papers · 1 filter
On outflowing viscous disc models for Be stars
John M. Porter
It is assumed that Be star discs are driven by viscosity. Emission from disc models is calculated and is confronted with continuum observations. It is found that the outflowing vis…
On the possibility that rotation causes latitudinal abundance variations in stars
John M. Porter
The effect of rotation of a star on the distribution of chemical species in radiative zones is discussed. Gravity darkening generates a large radiative force on heavy element ions…
On the warping of Be star discs
John M. Porter
The theory of radiatively-induced warps in accretion discs is applied to the discs of Be stars. It is found that these discs may develop warps in their inner regions, although once…
On the spin-down of Be stars
John M. Porter
The spin-down of Be stars due to angular momentum transport from star to disc has been considered. This has been prompted by empirical studies of observed optical and IR line profi…