The subgiant branch of ω Centauri seen through high-resolution spectroscopy - II. The most metal-rich population

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Volume 534 (October 2011)

A&A, 534 (2011) A53

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Table 6

Abundance analysis with varying helium.

WFI 216031	ATLAS	Δ_model^a	ATLAS	Δ_helium^b
	A(He) = 0.085		A(He) = 0.143

[Fe/H]	−0.73	+0.02	−0.74	−0.01
[Al/Fe]	+0.33	−0.01	+0.34	+0.01
[Ca/Fe]	+0.44	−0.01	+0.43	−0.01
[Ni/Fe]	+0.10	0.00	+0.12	+0.02
[Si/Fe]	+0.85	+0.01	+0.87	+0.02
[Ti/Fe]	−0.02	+0.01	+0.01	−0.01

WFI 220947	ATLAS	Δ_model^a	ATLAS	Δ_helium^b
	A(He) = 0.085		A(He) = 0.143

[Fe/H]	−0.64	−0.01	−0.65	−0.01
[Al/Fe]	+0.20	+0.01	+0.21	+0.01
[Ca/Fe]	+0.23	0.00	+0.23	+0.00
[Ni/Fe]	+0.23	+0.01	+0.25	+0.02
[Si/Fe]	+0.33	0.00	+0.35	+0.02
[Ti/Fe]	+0.16	+0.03	+0.13	−0.03

WFI 227902	ATLAS	Δ_model^a	ATLAS	Δ_helium^b
	A(He) = 0.085		A(He) = 0.143

[Fe/H]	−0.66	−0.01	−0.65	+0.01
[Al/Fe]	+0.47	0.00	+0.46	−0.01
[Ca/Fe]	+0.03	+0.01	−0.36	−0.01
[Ni/Fe]	−0.27	0.00	−0.28	−0.01
[Si/Fe]	+0.58	0.00	+0.58	+0.00
[Ti/Fe]	+0.65	+0.02	+0.66	+0.01

Notes.

^(a)

Abundance ratio difference in the sense ATLAS 12 minus MARCS.

^(b)

Abundance ratio difference of ATLAS 12 models in the sense of enhanced helium minus normal helium.

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