منابع مشابه
On the warping of Be star discs
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 the warp amplitude is large enough then the interaction between the disc and fast radiatively-driven wind will determine its evolution. The warping is shown to be more important for later than earlier B stars. Althou...
متن کاملOne-armed oscillations in Be star discs
Aims. In this paper we study the effect of the quadrupole-term in the gravitational potential of a rotationally deformed central Be star on one armed density waves in the circumstellar disc. The aim is to explain the observed long-term violet over red (V/R) intensity variations of the double peaked Balmer emission-lines, not only in cool Be star systems, but also in the hot systems like γ Cas. ...
متن کاملContinuum IR emission of Be star wind-compressed discs
A prescription for the density of a wind compressed disc (WCD) is given and the IRemissionof the disc is calculated. The prescription enables emission fromWCDs to be calculated simply without recourse to full 2 1 2 -dimensional (2 1 2 -D) modelling of rotating radiatively driven winds. It is shown that the standard WCD model is incapable of representing observed Be star discs. As a guide for fu...
متن کاملInflow-Implicit/Outflow-Explicit Scheme for Solving Advection Equations
We present new method for solving non-stationary advection equations based on the finite volume space discretization and the semi-implicit discretization in time. Its basic idea is that outflow from a cell is treated explicitly while inflow is treated implicitly. Since the matrix of the system in this new I2OE method is determined by the inflow fluxes it is an M-matrix yielding favourable solva...
متن کاملCoronary inflow and outflow responses to coronary artery occlusion.
Sudden complete occlusion of a major coronary artery (left circumflex or right coronary artery) was produced in anesthetized dogs. The effect on arterial inflow, venous outflow and O« saturation of coronary venous blood from the nonischemic left ventricle was studied. The usual response to occlusion of the left circumflex artery was an increase in flow in the left anterior descending artery and...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 2000
ISSN: 0252-9211
DOI: 10.1017/s0252921100056645