1830–211 – a flat-spectrum radio source with double structure

Pramesh Rao, A. ; Subrahmanyan, R. (1988) 1830–211 – a flat-spectrum radio source with double structure Monthly Notices of the Royal Astronomical Society, 231 (2). pp. 229-236. ISSN 0035-8711

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Official URL: https://academic.oup.com/mnras/article/231/2/229/1...

Related URL: http://dx.doi.org/10.1093/mnras/231.2.229


We present radio observations of the source 1830–211 whose structure is anomalous in relation to its spectrum. The flat-spectrum source has well-defined double structure with components of nearly equal flux densities and separated by ∼1 arcsec. The source does not fit into any of the known classes. It is possible that the double structure is due to gravitational lensing of a single flat-spectrum source by the potential of a foreground galaxy, but even this does not fully explain all the observations.

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