The longer optical time scales of a large sample of quasars
The longer optical time scales of a large sample of quasars
复制标题
大量类星体样本的更长光学时间尺度
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
S. Clements
中科院分区：
文献类型：
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作者：
Alex. G. Smith;A. D. Nair;R. J. Leacock;S. Clements
在仔细研究的60个类星体样本中，75%的类星体显示出其光通量基本水平长期变化的证据。内部一致的光变曲线进行了分析，通过三种不同的方法，努力分配这些变化的时间尺度。熟悉的快速，大幅度耀斑被明确排除在研究之外。大多数观测到的时间尺度范围从3年到15年，但当它们被转换到物体的静止帧时，在2年到6年之间有很强的集中。
Of a carefully studied sample of 60 quasars, 75% displayed evidence of long-term changes in the base levels of their optical fluxes. Internally consistent light curves were analyzed by three different methods in an effort to assign time scales to these changes. The familiar rapid, large-amplitude flares were specifically excluded from the study. The majority of the observed time scales range from 3 to 15 yr, but when they are translated into the rest frames of the objects, there is a strong concentration between 2 and 6 yr.