Radial velocity tracers (gray dots/black stars) and the radial velocity dispersion (RVD) profiles (black circles) of Fig. 3 shown on the plane. The RVDs are curves prepared assuming that either only Leo I and X (the SI sample) or both these two and A, B, C, D (the SII sample), are excluded (see Table 1). With all tracers included (with the exception of Leo I), a bump structure centered at ≈70 kpc would appear (light gray circles). The inclusion or exclusion of A, C, and D does not influence the RVDs significantly (only a little bit close to ≈ 50 kpc), whereas the inclusion of B rises the RVD curve for radii greater than 100 kpc. Thus, the RVD curves are mainly dependent on only two tracers B (Hercules) and X. The large gray circles are the reference values based on the literature (the same as in Fig. 3).
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