Abundance to age ratios in the HARPS-GTO sample with Gaia DR2 - Chemical clocks for a range of [Fe/H]

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Table 6

Comparison of 1D relations with those in the literature for the solar twins subset.

Formula	Adj-R²	a′	b′	Δa′	Δb′	Source
	0.84	0.209	−0.041	0.023	0.003	This work
		0.175	−0.0404	0.011	0.0019	Nissen (2015)
[Y/Mg]		0.170	−0.0371	0.009	0.0013	Nissen (2016)
		0.150	−0.0347	0.007	0.0012	Nissen et al. (2017)
		0.176	−0.0410	0.011	0.0017	Spina et al. (2016)
		0.186	−0.0410	0.008	0.0010	Tucci Maia et al. (2016)

	0.84	0.210	−0.042	0.024	0.004	This work
		0.196	−0.0427	0.009	0.0014	Nissen (2016)
[Y/Al]		0.174	−0.0400	0.008	0.0012	Nissen et al. (2017)
		0.194	−0.0459	0.011	0.0018	Spina et al. (2016)

Notes. Formula is the dependent variable estimated using the stellar age. adj-R² is the statistic to measure the goodness of the regression. The rest are the linear regression coefficients and their uncertainties. See text for details.

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