【摘要】 介绍了近年来Seyfert领域中关于分子环（torns）研究情况和现状。分子环模型的提出源于2型Seyfert星系核的光学偏振观测的结果与传统的1型Seyfert核的观测特征的相似性。在torns结构存在的假设下，讨论其对观测的作用，阐述了torns可能的结构和演化及其在Seyfert统一模型中的重要地位。还讨论了torns的遮挡、束流效应和由此造成的多波段观测特性，着重介绍了散射效应及其造成的偏振。更多还原

【Abstract】 The study of the molecular torns in seyfert galajxies is introduced. This structure is suggested from the similarity between the polarization measarements of Seyfert 2 and the observational data of Seyfert 1. With torns structure hypothesis, we discuss its effects on observational results,describe the possible structure and evolution of torns as well as its importance in the unified model. The effects of obscuring and beaming, and multi-waveband properties caused by these effects are described. The scattering effect and the observed polarization induced by this effect are emphasized.更多还原