摘要
BL Lac型天体是一类特殊的活动星系核,根据辐射能谱的不同可以分为低峰值频率BL Lac型天体(LBLs),中间峰值频率BL Lac型天体(IBLs),高峰值频率BL Lac型天体(HBLs),以及极高峰值频率BL Lac型天体(UHBLs)。不同类型BL Lac型天体具有不同的辐射特性,通过射电、光学、X射线、伽玛射线等多波段的观测可以发现很多特殊类型及辐射特性的BL Lac型天体,而甚长干涉测量技术(Very Long Baseline Interferometry,VLBI)是目前分辨率最高的观测技术,也是探测致密核区结构的唯一手段。主要介绍目前对BL Lac型天体的VLBI观测研究概况,以及对其中一些特殊BL Lac型天体VLBI研究的进展及初步结果。
BL Lac objects constitute a subclass of extreme Active Galactic Nuclei （AGN）. Based on their synchrotron peak frequencies, they can be classified as low-frequency peaked BL Lac objects （LBLs） , intermediate-frequency peaked BL Lac objects （IBLs）, high-frequency peaked BL Lac objects （HBLs）, and Ultra-high-energy peak BL Lac objects （UHBLs）. The properties of BL Lacs usually vary along the peak frequency. From radio, optical, X-ray, and Gamma-ray observations of BL Lac objects, more and more unusual BL Lac objects will be found. The VLBI is currently the technique to achieve the highest resolution, and is the only effective measure for observing compact nucleus regions of BL Lac objects. This paper mainly covers the research progress of BL Lac objects with the VLBI technique, and our recent results of the VLBI observations of some unusual BL Lac objects.
出处
《天文研究与技术》
CSCD
2012年第4期348-352,共5页
Astronomical Research & Technology
基金
国家自然科学基金(10978009
11163002)
贵州省自然科学技术基金(20092064)资助
