Collimated synchrotron threads linking the radio lobes of ESO 137-006
Journal
Date Issued
2020
Author(s)
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Makhathini, S.
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Smirnov, O.
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Andati, L. A. L.
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de Blok, E.
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Józsa, G. I. G.
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Kamphuis, P.
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Molnár, D. Cs.
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Ramaila, A. J. T.
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Thorat, K.
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White, S. V.
Abstract
We present MeerKAT 1000 MHz and 1400 MHz observations of a bright radio galaxy in the southern hemisphere, ESO 137-006. The galaxy lies at the centre of the massive and merging Norma galaxy cluster. The MeerKAT continuum images (rms ∼0.02 mJy beam-1 at ∼10″ resolution) reveal new features that have never been seen in a radio galaxy before: collimated synchrotron threads of yet unknown origin, which link the extended and bent radio lobes of ESO 137-006. The most prominent of these threads stretches in projection for about 80 kpc and is about 1 kpc in width. The radio spectrum of the threads is steep, with a spectral index of up to α ≃ 2 between 1000 and 1400 MHz.
Volume
636
Start page
L1
Issn Identifier
0004-6361
Ads BibCode
2020A&A...636L...1R
Rights
open.access
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