Fig. 3.
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Projected surface density maps of simulated UDGs. Left: UDG launched from R = 1 Mpc with an eccentricity e = 0 after 0.1 Gyr. Middle: Same UDG after 5 Gyr, with tidal tails. Right: UDG launched from R = 1.4 Mpc with e = 0.99 after 3.1 Gyr. In all panels, the blue contour corresponds to a surface brightness threshold of 29.5 mag arcsec−2.
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