The Old Halo metallicity gradient: the trace of a self-enrichment process:

Table 2.


Metallicity vs logD for the OH+noHGR groups

[Fe/H] logD n
-1.2  [Fe/H] < -0.8
-1.6  [Fe/H] < -1.2
-2.0  [Fe/H] < -1.6
-2.4  [Fe/H] < -2.0
0.41
0.64
0.89
1.02
13
28
25
9



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