Accretion Disk Structure And Evolution

克雷格·惠勒博士将利用这一奖项在各种情况下探索吸积盘的热不稳定性，以便更深入地了解双星和相关系统中的瞬态现象。将尝试结合非局部角动量输运模型来取代当前的粘度模型。将探讨不稳定圆盘对关键参数的敏感性，如传输率、内外圆盘半径、中心质量和粘度。将改进中间极双星系统GK Per的磁性截短盘模型，以便对预计在1992年中期发生的下一次爆发的X射线、紫外线和光学行为进行定量预测。包含时间依赖的日冕以及来自内盘、致密天体和日冕的盘辐射的伴随效应的模型将用于探索软x射线瞬变的行为，如Agl X-1和Cen X-4，其中包含中子星和一些瞬变黑洞候选者。

Dr. Craig Wheeler will use this award to explore thermal instabilities in accretion disks in a variety of contexts in order to gain a deeper understanding of transient phenomena in binary stars and related systems. An attempt will be made to incorporate models of non-local angular momentum transport to supplant current models for viscosity. The sensitivity of unstable disks to key parameters, such as transfer rate, inner and outer disk radii, central mass, and viscosity, will be explored. Models of the magnetically truncated disk of the intermediate polar binary system GK Per will be refined to make quantitative predictions of the X- ray, ultraviolet, and optical behavior of the next outburst expected about mid 1992. Models incorporating time dependent coronae and the attendant effects of disk irradiation from the inner disk, the compact object, and the corona will be used to explore the behavior of soft X-ray transients like Agl X-1 and Cen X-4 which contain neutron stars and a number of transient black hole candidates.