论文标题
UKIDSS超深调查中的长期NIR变异性：高红移时AGN活性的新探测
Long-term NIR Variability in the UKIDSS Ultra Deep Survey: a new probe of AGN activity at high redshift
论文作者
论文摘要
我们提出了首次使用长期NIR变异性选择AGN的尝试。通过分析UKIDSS超深调查中所有星系的K波段光曲线，这是〜1平方英尺的最深入的NIR调查，我们已经隔离了393个可变AGN候选者。与其他选择技术的比较表明，只有一半的变量来源也使用深chandra X射线成像或IRAC颜色选择选择，这表明使用NIR可变性可以定位通过更多标准选择技术遗漏的AGN。特别是，我们发现长期的NIR变异性在低亮度和低恒星质量的宿主星系中识别AGN，其中许多似乎相对X射线安静。
We present the first attempt to select AGN using long-term NIR variability. By analysing the K-band light curves of all the galaxies in the UKIDSS Ultra Deep Survey, the deepest NIR survey over ~1 sq degree, we have isolated 393 variable AGN candidates. A comparison to other selection techniques shows that only half of the variable sources are also selected using either deep Chandra X-ray imaging or IRAC colour selection, suggesting that using NIR variability can locate AGN that are missed by more standard selection techniques. In particular, we find that long-term NIR variability identifies AGN at low luminosities and in host galaxies with low stellar masses, many of which appear relatively X-ray quiet.
