ΔY/ΔZ from the analysis of local K dwarfs | Astronomy & Astrophysics (A&A)

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Table 3:

Initial helium $Y_{\rm ini}$ and metal $Z_{\rm ini}$ abundances provided by recent standard solar models by different authors (see footnotes).
Models	$Y_{\rm ini}$	$Z_{\rm ini}$	$\Delta Y / \Delta Z$
Pisa^a	0.2532	0.0137	0.380
B2005^b	0.2614	0.0140	0.957
G2006^c	0.2570	0.0135	0.666
S2009^d	0.2593	0.0139	0.813
S2009b^e	0.2617	0.0149	0.919

Notes. Models are computed adopting the heavy element mixture by Asplund et al. (2005).

References. ^(a) Tognelli et al. (2010), ^(b) Bahcall et al. (2005a), ^(c) Guzik et al. (2005), ^(d) Serenelli et al. (2009), ^(e) Serenelli et al. (2009), mixture by Asplund et al. (2009).

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