Radio, optical and X-ray nuclei in nearby 3CRR radio galaxies
Radio, optical and X-ray nuclei in nearby 3CRR radio galaxies
复制标题
附近 3CRR 射电星系中的射电核、光学核和 X 射线核
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
D. M. Worrall
中科院分区：
文献类型：
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作者：
M. Hardcastle;D. M. Worrall
HST观测表明，低红移的3CR射电星系经常表现出与GHz频率射电核心位置一致的点状光学成分。在本文中，我们讨论了在这些对象的无线电，光学和X射线核心的光度之间的相关性，并认为，所有三个组件有一个共同的起源在相对论喷流的基础。在统一模型中，FR I射电星系应该看起来像是暗的、红移的BL Lac天体。我们表明，只有当射电星系的核X射线辐射是逆康普顿起源时，这种模型才与射电星系的光谱能量分布相一致。
HST observations have shown that low-redshift 3CR radio galaxies often exhibit a point-like optical component positionally coincident with the GHz-frequency radio core. In this paper we discuss the correlation between the luminosities of the radio, optical and X-ray cores in these objects, and argue that all three components have a common origin at the base of the relativistic jets. In unified models, FR I radio galaxies should appear as dimmed, redshifted versions of BL Lac objects. We show that such models are consistent with the spectral energy distributions of the radio galaxies only if the nuclear X-ray emission in radio galaxies is inverse Compton in origin.