Distribution of m_b/m_tot against R_peri/R_apo in the galactic halo at ﹩z=2.0﹩. Red, blue, orange, and purple numbers indicate different ranges of the pericentric distance from ﹩1< R_{\mathrm{peri}\,}/ \mathrm{kpc}\,< 2﹩ to ﹩4< R_{\mathrm{peri}\,}/ \mathrm{kpc}\,< 5﹩, and the numbers indicate how many times each clump passes the pericenter. We obtain pericenters and apocenters from the most recent period of the clumps. Note that we do not consider clumps that have never passed pericenters or larger pericentric distances ﹩R_{\mathrm{peri}\,}> 5﹩ kpc in this plot.