منابع مشابه
Dispersal of Protoplanetary Disks by Central Wind Stripping
We present a model for the dispersal of protoplanetary disks by winds from either the central star or the inner disk. These winds obliquely strike the flaring disk surface and strip away disk material by entraining it in an outward radial-moving flow at the wind-disk interface which lies several disk scale heights above the mid-plane. The disk dispersal time depends on the entrainment velocity,...
متن کاملA Wind Driven Warping Instability in Accretion Disks
A wind passing over a surface may cause an instability in the surface such as the flapping seen when wind blows across a flag or waves when wind blows across water. We show that when a radially outflowing wind blows across a dense thin rotating disk, an initially flat disk is unstable to warping. When the wind is subsonic, the growth rate is dependent on the lift generated by the wind and the p...
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 کاملSecurity-Constrained Unit Commitment Considering Large-Scale Compressed Air Energy Storage (CAES) Integrated With Wind Power Generation
Environmental concerns and depletion of nonrenewable resources has made great interest towards renewable energy resources. Cleanness and high potential are factors that caused fast growth of wind energy. However, the stochastic nature of wind energy makes the presence of energy storage systems (ESS) in wind integrated power systems, inevitable. Due to capability of being used in large-scale sys...
متن کامل"Compressed" compressed sensing
The field of compressed sensing has shown that a sparse but otherwise arbitrary vector can be recovered exactly from a small number of randomly constructed linear projections (or samples). The question addressed in this paper is whether an even smaller number of samples is sufficient when there exists prior knowledge about the distribution of the unknown vector, or when only partial recovery is...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1999
ISSN: 0252-9211
DOI: 10.1017/s0252921100071876