类星体3C273喷流中子源的γ因子和频谱  

GAMMA FACTORS AND SPECTRA OF COMPONENTS IN THE JET OF QSO 3C273

作　　者：张福俊[1] 周建峰[1] 

机构地区：[1]中国科学院上海天文台,上海200030

出　　处：《中国科学院上海天文台年刊》1998年第19期122-126,共5页Annals Shanghai Astronomical Observatory Chinese Academy of Sciences

摘　　要：毫米波VLBI观测结果表明，类星体3C273喷流中子源的洛伦兹因子γ并不是常数，子源在向外运动过程中有相互超越的现象。根据1988年用全球毫米波阵对3C273的观测结果和多波段上总流量的观测结果，该源的频谱可以被分解为若干个子源的频谱。我们首次获得3C273的“核”和产生流量耀发的新子源的频谱，它为我们提出新的解释模型提供了物理依据。According to the results obtained from mm - VLBI, gamma factors of components in the jet of QSO 3C273 are not constant. There is a possibility that one component could surmount others when they are moving outward from the core. From the results of both the VLBI observations and the records of total flux density at multi-frequencies in 1988, the spectrum of 3C273 could be resolved into several components. It is the first time that the spectra of the core of 3C273 and a new component, which caused the flux flare of 3C273 at the beginning of 1988, were obtained. Also, it is scientific basics for a new model used to explain the phenomena happened in 3C273.

关 键 词：河外射电源 类星射电源 类星体 喷流 甚长基线干涉测量 γ因子 中子源 频谱 

分 类 号：P158[天文地球—天文学]