Fig. 1

Left: Arp 65 pair: SDSS g, r, i-band false-colour image. The galaxy at the centre of the image is NGC 90 and the galaxy of similar size at the eastern edge of the image is NGC 93. Right: SRGb063 group: SDSS r-band image of the Arp 65 pair in the SRGb063 group. The blue and the red crosses are NGC 90 and NGC 93 respectively. Crosses with other colours represent nearby massive group members: CGCG 479-012 (green), NGC 85B (yellow), NGC 80 (orange). The black X marks the X-ray centroid of SRGb063 group from Mahdavi et al. (2000).
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