The self-enrichment of galactic halo
a clue to their formation ?
Correlation diagram for [Y/Fe] versus
[/Fe] with the
data from Jehin et al. (1999) (full squares), the data of Nissen and
Schuster (1997) (full triangles), the data of Zhao and Magain (1991)
(full pentagon), the data of Edvardsson et al.~(1993) for
[Fe/H] < -0.6
(full circles) and for [Fe/H] >- 0.6 (open circles).
The zero points have been fixed by comparing the results obtained for
the stars in common with Jehin et al. (1999)