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arXiv 1404.7499astro-ph.GAastro-ph.CO
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强射电源的光谱结构和能量学

The spectral structure and energetics of powerful radio sources

J. J. Harwood, M. J. Hardcastle, J. H. Croston, A. Stroe, R. Morganti, E. Orru

摘要:

确定电子群的能谱可以为射电源的基本物理学提供关键的见解;然而,缺乏高分辨率,宽带观测在我们对射电星系的理解中留下了许多模糊之处。JVLA和LOFAR等望远镜的改进能力意味着在任何给定观测的带宽内,现在可以产生详细的光谱形状。我们提出了最近的调查,强大的FR-II射电星系在GHz和MHz的频率,并首次显示其小尺度的光谱结构。我们强调传统的分析方法中存在的问题,并演示如何解决这些问题。我们提出了最新的低频研究结果,这表明在总能量含量的射电星系叶的人口作为一个整体的能量可能会产生影响的潜在增加。

英文摘要:

Determining the energy spectrum of an electron population can give key insights into the underlying physics of a radio source; however, the lack of high resolution, broad-bandwidth observations has left many ambiguities in our understanding of radio galaxies. The improved capabilities of telescopes such as the JVLA and LOFAR mean that within the bandwidth of any given observation, a detailed spectral shape can now be produced. We present recent investigations of powerful FR-II radio galaxies at GHz and MHz frequencies and show for the first time their small-scale spectral structure. We highlight problems in traditional methods of analysis and demonstrate how these issues can now be addressed. We present the latest results from low frequency studies which suggest a potential increase in the total energy content of radio galaxy lobes with possible implications for the energetics of the population as a whole.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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