Observability of intermittent radio sources in galaxy groups and clusters
Observability of intermittent radio sources in galaxy groups and clusters
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DOI：
10.1093/mnras/sty2191
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发表时间：
2018-08
影响因子：
4.8
通讯作者：
P. Yates;S. Shabala;M. Krause
中科院分区：
文献类型：
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作者：
P. Yates;S. Shabala;M. Krause
我们利用冥王星模拟代码对来自活动星系核的射电喷流进行了数值流体动力学模拟，目的是研究不同环境和能量注入的间歇性对射流膨胀叶的动力学和可观测特性的影响。首先在较差的群和簇环境中模拟锥形射流。我们表明，射电射流传播的环境在射电源的最终形态、动力学和可观察特性中起着很大的作用。与星系团相比，同样的喷流在弱星系团中的准直时间要晚得多，这导致了射电形态的明显差异。喷流的间歇性也影响了射电源的可观测特性，并且在集群环境中存在多个突出喷流的多个热点。我们量化了活动阶段和静止阶段的可检测性，并发现这是强烈的环境依赖。我们得出结论，射流的动力学和观测性质在很大程度上取决于能量注入和环境的细节。
We have carried out numerical hydrodynamic simulations of radio jets from active galactic nuclei using the PLUTO simulation code, with the aim of investigating the effect of different environments and intermittency of energy injection on the resulting dynamics and observable properties of the jet-inflated lobes. Initially conical jets are simulated in poor group and cluster environments. We show that the environment into which a radio jet is propagating plays a large role in the resulting morphology, dynamics, and observable properties of the radio source. The same jet collimates much later in a poor group compared to a cluster, which leads to pronounced differences in radio morphology. The intermittency of the jet also affects the observable properties of the radio source, and multiple hotspots are present for multiple outburst jets in the cluster environment. We quantify the detectability of active and quiescent phases, and find this to be strongly environment-dependent. We conclude that the dynamics and observational properties of jets depend strongly on the details of energy injection and environment.