BL Lac天体近代观测和理论研究的某些进展

Some Observational and Theoretical Progress of BL Lac Objects

本文评述了BL Lac天体近代观测和理论研究的某些新进展。第一节为引言;第二节分析了近几年来BL Lac天体在观测方面的某些新进展;第三节综述了BL Lac天体的某些理论与模型,着重讨论了吸积与喷流模型及利用光变时标对这两种模型的判别方法;最后一节讨论了BL Lac天体的宇宙学含义。

The recent progress of observational and theoretic researches for BL Lac objects is collected in this paper. Section 1 is an introduction. In section 2 we review some developments about observations. In section 3 some theories and models for BL Lac objects are summarized, especially the accretion disk model and the beaming model and the criteria used for discrimination between these models on the basis of variability time-scale being discussed in more detail. Finally, in section 4 the cos.mological implication of BL Lac objects is presented.