Integrated intensity map (moment 0) for H I emission across the disk of M 83 at a resolution of 21″. The black circle in the lower left corner marks the beam size of 21″ (≈500 pc). The black to white colorbar indicates integrated intensities from 0 − 100 K km s¹ and the orange to yellow integrated intensities above 101 K km s¹. We denote the companion galaxy UGCA 365 which in projection is ∼55 kpc away from the center of M 83. To the right, we show the enclosed optical disk (r₂₅  ∼  8 kpc) overlaid with H I column density contour (N_HI = 13 × 10¹⁹ cm⁻²) extending over a radius of ∼40 kpc. For visualization reasons, we show unfilled N_HI contours for the high resolution optical image. Beyond 10 kpc we show filled N_HI contours. The white line surrounding M 83 shows the field of view (FoV; i.e. the full mosaic coverage) of the VLA observation. (optical image credits: CTIO/NOIRLab/DOE/NSF/AURA, M. Soraisam; Image processing: Travis Rector, Mahdi Zamani & Davide de Martin; low resolution background > 10 kpc: DSS2).