Bow-and-Arrow Galaxy BAARG Signals Supersonic Dive into a Galaxy Cluster
A Himalayan citizen scientist using LOFAR’s LoTSS data spotted BAARG, a colossal radio galaxy spanning about 1.8 million light-years at redshift z≈0.159. Its bow-shaped western arc and bent eastern jet are interpreted as the host elliptical plunging supersonically into a nearby cluster, producing a bow shock that reshapes the jets. BAARG sits in a crowded, multi‑halo environment near Abell 1081, offering the clearest direct radio image yet of this morphology and suggesting many more such systems will emerge with future SKA-era surveys.