WISDOM project – VIII. Multiscale feedback cycles in the brightest cluster galaxy NGC 0708

ABSTRACT We present high-resolution (synthesized beam size 0${_{.}^{\prime\prime}}$088 × 0${_{.}^{\prime\prime}}$083 or 25 23 pc2) Atacama Large Millimetre/submillimetre Array 12CO(2–1) line and 236 GHz continuum observations, as well 5 enhanced Multi-Element Radio Linked Interferometer Network (e-MERLIN) of NGC 0708; the brightest galaxy in low-mass cluster Abell 262. The observations reveal a turbulent, rotating disc molecular gas core galaxy, high-velocity, blueshifted feature ?0${_{.}^{\prime\prime}}$4 (?113 pc) from its centre. submillimetre emission peaks at nucleus, but extends towards this anomalous CO feature. No corresponding elongation is found on same spatial scales with e-MERLIN. discuss potential causes for detected source, conclude that it most likely to be in-falling filament material condensing hot intracluster medium via chaotic cold accretion, also possible jet-driven outflow. estimate physical properties structure has these two scenarios, show either explanation viable. suggest future integral field spectrographs will able determine true cause emission, provide further evidence interaction between quenched cooling flows mechanical feedback both small large source.