J06587-5558 -- A Very Unusual Polarised Radio Source

Details J06587-5558 -- A Very Unusual Polarised Radio Source J06587-5558 -- A Very Unusual Polarised Radio Source

2001-10-16

arxiv.org/abs/astro-ph/0110381v1

Mon.Not.Roy.Astron.Soc. 328 (2001) L23

Astronomy and Astrophysics

Astrophysics

5 pages, 6 figures, accepted by MNRAS letters

Scientific paper

10.1046/j.1365-8711.2001.05045.x

We have found a peculiar radio source in the field of one of the hottest known clusters of galaxies 1E0657-56. It is slightly extended, highly polarised (54% at 8.8GHz) and has a very steep spectrum, with alpha ~ -1 at 1.3 GHz, steepening to ~ -1.5 at 8.8GHz (S \propto nu^alpha). No extragalactic sources are known with such high integrated polarisation, and sources with spectra as steep as this are rare. In this paper, we report the unusual properties of the source J06587-5558 and speculate on its origin and optical identification.

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