Fig. 5
Optical continuum luminosity versus radio luminosity at 1.4 GHz for the X-shaped sources of M11 (filled triangles), control sources (squares), and the new X-shaped sources analyzed here (empty triangles). A small subregion (“Region 1”) marked by a rectangle inside the plot is identified to provide a tighter luminosity match between the X-shaped and control samples (see M11 for details).
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