Mono-enriched stars and Galactic chemical evolution - Possible biases in observations and theory

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Table 5

Constrained and unconstrained best fitting models to the two most metal-poor stars.

	BD + 09_2190 ([Fe/H] = − 2.75)				BD + 24_1676 ([Fe/H] = −2.53)

Abund.∕model	Mass (M_⊙)		Energy (Foe)		Mass (M_⊙)		Energy (Foe)

log ɛ	Unconst.	Constr.	Unconstr.	Constr.	Unconstr.	Constr.	Unconstr.	Constr.
LTE	25.5	25.5^26.5	5.0	3.0_2.4	25.5^26.5	25.5^26.5		1.5
LTEred	25.5	25.5^26.5	10.0_5.0	3.0_2.4	25.5^26.5	26.5_25.5		1.5
NLTE				1.5^1.8		45.0_42.0	10	5.0_3.0

Notes. The reported value is the median, the limits are the 2.3 and the 97.7th percentile corresponding to 2σ lower and upper limits. The limits have been left empty where they are identical to the median value, which indicates that the limit is not well-resolved in the posterior distribution.

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