光学选类星体样本的光变  

THE VARIABILITY OF OPTICALLY SELECTED QSO SAMPLES

作　　者：卞维豪[1] 黄克谅[1] 周洪楠[1] 

机构地区：[1]南京师范大学物理系,南京210097

出　　处：《天文学报》2000年第3期225-231,共7页Acta Astronomica Sinica

基　　金：国家攀登计划;国家自然科学基金

摘　　要：利用测光数据研究时间跨度为 1 8年的光学选类星体样本的光变 ,发现此样本的光变比例约 40 % .还发现光变类星体的光变幅与光度反相关 ,即光度越大 ,光变越小 ;且光变幅与红移可能有相关性 .A study of the variability of optically selected quasar samples is presented. By using CCD photometric data, the long term (years) variability of quarsar samples is searched and it is found that about 40% of optically selected quasars vary in a time scale of 18 years. There is a negative correlation between the variability and luminosity, i.e. the more luminous QSOs show less variability. Besides, a correlation between variability and redshift may exist.

关 键 词：类星体 光变 样本 光学 

分 类 号：P158[天文地球—天文学]