相对论喷束模型中表现速度计算的修正  

REVISION OF THE CALCULATION OF APPARENT VELOCITIES IN RELATIVISTIC BEAMING MODEL

作　　者：吴盛殷[1] 

机构地区：[1]中国科学院北京天文台,北京100080

出　　处：《天文学报》1997年第4期405-411,共7页Acta Astronomica Sinica

基　　金：国家自然科学基金;攀登计划资助

摘　　要：在相对论喷束模型中，假设源的核在观测者静止坐标系中不动的前提下，推出了现在已得到广泛承认和采用的计算相对论等离子团横向视速度的公式．随着观测精度的提高，对核固定不动的假设提出了怀疑，认为有必要重新估价表现横向速度公式的正确性，并在更普遍的框架下，找出该公式的修正形式．本文试图对几种根据目前对射电源一般结构认识提出的模型，初步探讨这种修正的可行性．The currently accepted and widely used formula for calculation of apparenttransverse velocities of plasmons or shocks in frame of relativistic beaming model wasdeduced under assumption that the core itself is fixed in a rest frame with respect tothe observer. Due to improvement of measurement accuray and accumulation ofobservatioh0naI data, the argument and assumption are now doubted. It is reasonable tore-evaluate the correction of the formula and to try to find a revised one in a moregeneral frame. The feasibility and necessity of the revision are discussed in thes paperon the basis of general recognition of the radio source structure. The correspondingrevisions in evaluations of the minimum Lorentz factor and the maximum anglebetween the beam and line of sight are briefly discusseed at the end of the paper.

关 键 词：河外射电源 表观速度 相对论喷束模型 

分 类 号：P162.5[天文地球—天文学]