标题： 休眠黑洞讲述了活动星系核演化的故事 显示英文标题

标题： Dormant black holes tell a story about the evolution of active galactic nuclei

摘要： 在我们最近的论文（Salucci 等，1998）中，我们研究了星系中大质量暗天体的质量分布函数，利用了现有的光学和射电观测数据。 在假设大质量黑洞为活动星系核提供能量的前提下，我们比较了大质量暗天体和导致观测到的活动的黑洞的质量函数。 我们发现，每个活动星系核一次短时爆发的场景与现有数据相符。 在这里，我们总结并讨论了我们研究的主要观点。 显示英文摘要

摘要： In our recent paper (Salucci et al. 1998) we have investigated the mass distribution function of massive dark objects in galaxies, exploiting the available optical and radio observations. Under the assumption that massive black holes power active galactic nuclei, we have compared the mass functions of massive dark objects and black holes responsible for the observed activity. We have found that a scenario with a single short burst per active galactic nucleus is in a good agreement with the available data. Here we summarize and discuss the main points of our study.