WISDOM project -- VIII. Multi-scale feedback cycles in the brightest
  cluster galaxy NGC 0708
  We present high-resolution (synthesised beam size 0."088x0."083 or 25x23
pc$^2$) Atacama Large Millimetre/submillimetre Array (ALMA) $^{12}$CO(2-1) line
and 236 GHz continuum observations, as well as 5 GHz enhanced Multi-Element
Radio Linked Interferometer Network (e-MERLIN) continuum observations, of NGC
0708; the brightest galaxy in the low-mass galaxy cluster Abell 262. The line
observations reveal a turbulent, rotating disc of molecular gas in the core of
the galaxy, and a high-velocity, blue-shifted feature ~0."4 (~113 pc) from its
centre. The sub-millimetre continuum emission peaks at the nucleus, but extends
towards this anomalous CO emission feature. No corresponding elongation is
found on the same spatial scales at 5 GHz with e-MERLIN. We discuss potential
causes for the anomalous blue-shifted emission detected in this source, and
conclude that it is most likely to be a low-mass in-falling filament of
material condensing from the hot intra-cluster medium via chaotic cold
accretion, but it is also possible that it is a jet-driven molecular outflow.
We estimate the physical properties this structure has in these two scenarios,
and show that either explanation is viable. We suggest future observations with
integral field spectrographs will be able to determine the true cause of this
anomalous emission, and provide further evidence for interaction between
quenched cooling flows and mechanical feedback on both small and large scales
in this source.
