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Fig. 2

image

Six relations between the ratios [X/H] vs [Sr/H] where X is a first peak element, for the (up to) 11 “LP first stars” studied here (black dots). The blue open diamond represents the peculiar C-rich and Ba-poor star CS 22949-037. The two reference stars HD 122563 (r-poor star) and CS 31082-001 (r-rich star) are represented by an open and a filled red star symbol, respectively. The dashed line shows the one-to-one correspondence line. The typical error is indicated in the right corner of the figures.

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