先前的研究只关注存在有明显活动星核的星系，这很可能导致结果产生偏差，Jahnke说。

Earlier studies looked only at galaxies with the brightest active nuclei, which could have biased their results, Jahnke said.

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本文中我们利用盘不稳定模型和星爆模型的基本思想，模拟活动星系核在光学波段的光度和光谱斜率变化，并将模拟的结果和观测进行比较。

In this paper, using disk-instability model and starburst model, the AGN optical variability and spectral slope variability are simulated and confronted with observations.

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