中等亮类星体的光变  

Variability of Medium Bright Qusar Sample

作　　者：卞维豪[1] 黄克谅[1] 

机构地区：[1]南京师范大学物理系

出　　处：《南京师大学报（自然科学版）》1998年第1期32-37,共6页Journal of Nanjing Normal University(Natural Science Edition)

摘　　要：研究了极限星等为Ｂ＝１７．６的中等亮类星体样本（ＭＢＱＳ）的光变．以Ｑ＞３．０作为光变的判据，大约有１／３的类星体被探测到有光变；光变幅平均为０．４７星等；光变时间尺度通常为年，有些可短至天．光变类星体所占百分比与红移、光度无关；但光变幅与红移、光度反相关．A variability of 32 Quasars of Medium Bright Quasar Sample (MBQS) which is complete to nominal limiting magnitudes B =17.6 is studied. Q >3.0 is taken as criterion of variability. About the one third of MBQS have been detected to have variability;the averaged amplitude of variability is 0.47 magnitude;the timescale of variability is usually years and sometimes very short,days;the percentage of variable quasars is not related with redshift or luminosity of quasar;but amplitude of variability seems to be anticorrelated with both redshift and luminosity of quasar.

关 键 词：类星体 光变 中等亮类星体 红移 

分 类 号：P158[天文地球—天文学]