Collimated synchrotron threads linking the radio lobes of ESO137-006
  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 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 $\alpha\simeq 2$ between 1000 MHz and 1400 MHz.
