Dynamics of Powerful Radio Galaxies

IF 3.2 Q2 ASTRONOMY & ASTROPHYSICS Galaxies Pub Date : 2023-07-17 DOI:10.3390/galaxies11040087
R. Turner, S. Shabala
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Abstract

Analytical models describing the dynamics of lobed radio sources are essential for interpretation of the tens of millions of radio sources that will be observed by the Square Kilometre Array and pathfinder instruments. We propose that historical models can be grouped into two classes in which the forward expansion of the radio source is driven by either the jet momentum flux or lobe internal pressure. The most recent generation of analytical models combines these limiting cases for a more comprehensive description. We extend the mathematical formalism of historical models to describe source expansion in non-uniform environments, and directly compare different model classes with each other and with hydrodynamic numerical simulations. We quantify differences in predicted observable characteristics for lobed radio sources due to the different model assumptions for their dynamics. We have made our code for the historical models analysed in this review openly available to the community.
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强大射电星系的动力学
描述波瓣无线电源动力学的分析模型对于解释平方公里阵列和探路仪将观测到的数千万无线电源至关重要。我们提出,历史模型可以分为两类,其中射电源的向前扩展是由喷流动量通量或波瓣内压驱动的。最新一代的分析模型结合了这些限制性情况,以进行更全面的描述。我们扩展了历史模型的数学形式来描述非均匀环境中的源扩展,并直接将不同的模型类别相互比较以及与流体动力学数值模拟进行比较。我们量化了由于其动力学的不同模型假设而导致的波瓣无线电源预测可观测特性的差异。我们已经向社区公开了本次审查中分析的历史模型代码。
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来源期刊
Galaxies
Galaxies Physics and Astronomy-Astronomy and Astrophysics
CiteScore
4.90
自引率
12.00%
发文量
100
审稿时长
11 weeks
期刊介绍: Es una revista internacional de acceso abierto revisada por pares que proporciona un foro avanzado para estudios relacionados con astronomía, astrofísica y cosmología. Areas temáticas Astronomía Astrofísica Cosmología Astronomía observacional: radio, infrarrojo, óptico, rayos X, neutrino, etc. Ciencia planetaria Equipos y tecnologías de astronomía. Ingeniería Aeroespacial Análisis de datos astronómicos. Astroquímica y Astrobiología. Arqueoastronomía Historia de la astronomía y cosmología. Problemas filosóficos en cosmología.
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