1830-211 - A flat-spectrum radio source with double structure

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Models, Extragalactic Radio Sources, Gravitational Lenses, Radio Spectra, Continuous Spectra, Flux Density, Luminosity, Quasars, Radio Galaxies

Scientific paper

The authors 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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