Chemical composition of planet building blocks as predicted by stellar population synthesis

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Volume 622 (February 2019)

A&A, 622 (2019) A49

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Table 2

Average mass fraction values for iron and water, and for the mass percentage of heavy elements, in the different galactic populations.

	⟨f_iron ⟩	⟨f_w⟩	⟨f_Z⟩
HARPS simulation (d < 100 pc, including a Gaussian dispersion)
Thin	31.8 ± 2.6	58.7 ± 2.9	1.0 ± 0.4
Thick	28.3 ± 2.3	64.4 ± 2.1	0.7 ± 0.4
All populations	31.8 ± 2.6	58.7 ± 2.9	1.0 ± 0.4
HARPS simulation (d < 100 pc)
Thin	30.3 ± 0.7	58.0 ± 0.4	1.1 ± 0.4
Thick	23.6 ± 1.5	61.5 ± 0.7	0.7 ± 0.4
All populations	29.4 ± 2.4	58.5 ± 1.3	1.0 ± 0.4
HARPS, S17
Thin	31.974 ± 1.750	59.713 ± 7.106	1.508 ± 0.597
Thick	24.305 ± 1.623	72.179 ± 5.961	1.135 ± 0.295
Halo^a	23.110 ± 2.884	83.990 ± 4.115	0.808 ± 0.082
Sun	33	60	1.3
SN simulation (d < 1 kpc)
Thin	30.2 ± 0.8	58.0 ± 0.4	1.1 ± 0.4
Thick	23.5 ± 1.7	61.6 ± 0.9	0.7 ± 0.4
Halo	20.4 ± 0.2	63.0 ± 0.1	0.2 ± 0.3
All populations	28.7 ± 2.9	58.8 ± 1.5	1.0 ± 0.4
MW simulation (d < 50 kpc)
Thin	30.0 ± 0.8	58.1 ± 0.4	1.3 ± 0.6
Thick	23.5 ± 1.7	61.6 ± 0.9	0.7 ± 0.4
Halo	20.4 ± 0.2	63.0 ± 0.1	0.2 ± 0.2
Bulge	26.2 ± 1.5	60.1 ± 0.8	1.5 ± 0.5
All populations	27.0 ± 3.1	59.7 ± 1.6	1.2 ± 0.6

Notes. We also report values found through the stoichiometric model for the Sun. Values are expressed in percent, and their standard deviations are given. ^(a)Only three halo stars are included in this galactic population.

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