A mapping method of age estimation for binary stars: Application to the α Centauri system A and B

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Table 1.

Results from recent observations of α Centauri A and B.

	α Centauri A		α Centauri B
	Kervella et al. (2017)	Akeson et al. (2021)	Kervella et al. (2017)	Akeson et al. (2021)
M/M_⊙	1.1055 ± 0.0039	1.0788 ± 0.0029	0.9373 ± 0.0033	0.9092 ± 0.0025
R/R_⊙	1.2234 ± 0.0053	1.2175 ± 0.0055	0.8632 ± 0.0037	0.8591 ± 0.0036
L/L_⊙	1.521 ± 0.015	1.5059 ± 0.0019	0.503 ± 0.006	0.4981 ± 0.0007

	Porto de Mello et al. (2008)	Morel (2018)	Porto de Mello et al. (2008)	Morel (2018)
${[F e / H]}_{⊙}^{}$ $Mathematical equation: $ [Fe/H]^{}_{\odot} $$	0.24 ± 0.03	0.237 ± 0.007	0.25 ± 0.04	0.221 ± 0.016

Z/X	0.039 ± 0.006^a	0.0423 ± 0.0050^b	0.039 ± 0.006^a	0.0407 ± 0.0050^b
		0.0312 ± 0.0050^c		0.0300 ± 0.0050^c

Notes. ^(a)Z/X is computed using (Z/X)_⊙ = 0.022 (see Joyce & Chaboyer 2018), ^(b)Z/X is computed using (Z/X)_⊙ = 0.0245, as in the high-Z Sun (Grevesse & Noels 1993), ^(c)Z/X is computed using (Z/X)_⊙ = 0.0181, as in the low-Z Sun (Asplund et al. 2009).

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