Fig. 5.
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N(C IV) distribution. Top left panel: log N(C IV) cumulative distributions for the general DLA population (blue line, from Fox et al. 2007) and ESDLAs (red line). Top right panel: same for the log N(Si IV) distributions. Bottom panel: log N(C IV) vs. log N(Si IV) for ESDLAs (red points) and DLAs (blue points, taken from Fox et al. 2007). The straight line indicates log(N(C IV)) = log(N(Si IV)) + 0.5.
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