Circumstellar Matter: Neutral Shells and Planetary Nebula Formation

Huggins, Patrick AST 96-17941 . Huggins博士继续研究低质量和中等质量恒星演化的最新阶段——从AGB阶段到白矮星的转变以及行星状星云的形成。他使用各种各样的观测技术，包括红外光谱成像、毫米干涉测量、毫米和亚毫米单盘观测，研究了从前体原行星到高度演化星云的不同演化阶段的天体样本。利用这些天体周围中性壳层的分子和原子线发射，哈金斯博士将研究壳层动力学、速度场、几何形状和气体特性，以详细描绘中性壳层的演化和行星状星云的形成。＊＊＊

Huggins, Patrick AST 96-17941 Dr. Huggins continues his research on the latest stages of stellar evolution in low and intermediate mass stars - the transition from the AGB phase to white dwarfs and the formation of planetary nebulae. He uses a wide variety of observational techniques, including infrared spectro-imaging, millimeter interferometry, and millimeter and sub-millimeter single disk observations to study a sample of objects covering different stages of evolution from precursor proto-planetaries to highly evolved nebulae. Using the molecular and atomic line emission from the neutral shells around these objects, Dr. Huggins will investigate the shell dynamics, velocity field, geometry, and properties of the gas, to develop a detailed picture of the evolution of the neutral shells and the formation of planetary nebulae. ***