LOS velocity dispersion profile as a function of major-axis radius of the total (open black circles), bright (open green diamonds), and faint (filled red squares) magnitude-corrected PNe in the halo of M49. The coloured bands denote the 1σ errors. The stellar velocity dispersion profile is indicated by the dashed black line (V17b) and the dispersions of metal-poor and metal-rich GCs are indicated by the solid blue and dashed red line respectively (C03). The grey error bars connected with dashes denote the velocity dispersion of galaxies in the Virgo Subcluster B. The velocity dispersion of the faint PN-sample reaches that of the Subcluster B at large radii, which indicates that these PNe are tracing the underlying intra-group light.
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