论文标题
Lofar揭示的射电星系的占空比：残余和重新启动的无线电源人群
The duty cycle of radio galaxies revealed by LOFAR: remnant and restarted radio source populations in the Lockman Hole
论文作者
论文摘要
与主动银河核（AGN）相关的无线电喷射的反馈在星系的演变中起着强烈的作用。这些无线电飞机的动力学能力似乎显示出时间变化，但是负责此过程的机制尚不清楚。最近，低频阵列（Lofar）发现了大量的活动，残余和重新启动的无线电喷射群体。通过关注Lockman孔中的Lofar数据，在这项工作中，我们在半分析环境（RAISE）动态模型中使用无线电AGN来介绍对活动，残余和重新启动无线电源群体的首次自洽建模分析。与最近的其他工作一致，我们的模型预测，残留的无线电裂片很快就消失了。因此，任何高（> 10％）观察到的残留和重新启动来源的比例都需要优势的短暂喷气机。我们推测这可以由反馈调节的积聚提供。
Feedback from radio jets associated with Active Galactic Nuclei (AGN) plays a profound role in the evolution of galaxies. Kinetic power of these radio jets appears to show temporal variation, but the mechanism(s) responsible for this process are not yet clear. Recently, the LOw Frequency ARray (LOFAR) has uncovered large populations of active, remnant and restarted radio jet populations. By focusing on LOFAR data in the Lockman Hole, in this work we use the Radio AGN in Semi-Analytic Environments (RAiSE) dynamical model to present the first self-consistent modelling analysis of active, remnant and restarted radio source populations. Consistent with other recent work, our models predict that remnant radio lobes fade quickly. Any high (>10 percent) observed fraction of remnant and restarted sources therefore requires a dominant population of short-lived jets. We speculate that this could plausibly be provided by feedback-regulated accretion.
