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

Table 1.


PGCC masses and metallicities for different values of the pressure of the medium confining the PGCCs.

Ph[dyne.cm-2] log10M/M [Fe/H]
10-11
10-10
10-9		 6.5
6.0
5.5 		-2.2
-1.7
-1.2


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