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Fig. 2.

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LoTSS DR2 images of Alcyoneus, centred around host galaxy J081421.68+522410.0, at central frequency νc = 144 MHz and standard resolutions θFWHM = 6″ (top) and θFWHM = 20″ (bottom). At these resolutions, Alcyoneus’s lobes are easily overlooked. For scale, we show the stellar Milky Way disk (diameter: 50 kpc) and a ten-times-inflated version; the spiral galaxy shape follows Ringermacher & Mead (2009).

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