A catalogue of asteroseismically calibrated ages for APOGEE DR17 - The predictions of a CatBoost machine learning model based on the [Mg/Ce] chemical clock and other stellar parameters

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Volume 685 (May 2024)

A&A, 685 (2024) A66

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Table E.2

Stellar parameters for the first group of young metal-poor stars. The errors on log(𝑔) originate from the predictions of the neural network reported in APOGEE DR17. The ages are derived from the CatBoostRegressor model. The errors on age are computed based on the median fractional error obtained with the model for ages between one and two billion years, i.e. 26%.

Gaia DR3	T_eff	[Fe/H]	log(𝑔)	L	M	Age_Model

	K	dex	dex	L_⊙	M_⊙	Gyr
6045465055252946560	$4928_{- 100}^{+ 100}$ ${4928_{ - 100}^{ + 100}}$	$- {1.04}_{- 0.1}^{+ 0.1}$ ${ - 1.04_{ - 0.1}^{ + 0.1}}$	${2.443}_{- 0.034}^{+ 0.034}$ ${2.443_{ - 0.034}^{ + 0.034}}$	${83.16}_{- 10.19}^{+ 10.19}$ ${83.16_{ - 10.19}^{ + 10.19}}$	${1.584}_{- 0.264}^{+ 0.264}$ ${1.584_{ - 0.264}^{ + 0.264}}$	${1.48}_{- 0.39}^{+ 0.39}$ ${1.48_{ - 0.39}^{ + 0.39}}$
6045456503982565120	$5185_{- 100}^{+ 100}$ ${5185_{ - 100}^{ + 100}}$	$- {0.98}_{- 0.1}^{+ 0.1}$ ${ - 0.98_{ - 0.1}^{ + 0.1}}$	${3.364}_{- 0.041}^{+ 0.041}$ ${3.364_{ - 0.041}^{ + 0.041}}$	${10.32}_{- 1.81}^{+ 1.81}$ ${10.32_{ - 1.81}^{ + 1.81}}$	${1.335}_{- 0.285}^{+ 0.285}$ ${1.335_{ - 0.285}^{ + 0.285}}$	${1.96}_{- 0.51}^{+ 0.51}$ ${1.96_{ - 0.51}^{ + 0.51}}$
6045464952173727104	$4931_{- 100}^{+ 100}$ ${4931_{ - 100}^{ + 100}}$	$- {1.02}_{- 0.1}^{+ 0.1}$ ${ - 1.02_{ - 0.1}^{ + 0.1}}$	${2.485}_{- 0.038}^{+ 0.038}$ ${2.485_{ - 0.038}^{ + 0.038}}$	${59.53}_{- 5.85}^{+ 5.85}$ ${59.53_{ - 5.85}^{ + 5.85}}$	${1.244}_{- 0.192}^{+ 0.192}$ ${1.244_{ - 0.192}^{ + 0.192}}$	${1.98}_{- 0.51}^{+ 0.51}$ ${1.98_{ - 0.51}^{ + 0.51}}$
6045459768157880192	$5092_{- 100}^{+ 100}$ ${5092_{ - 100}^{ + 100}}$	$- {1.04}_{- 0.1}^{+ 0.1}$ ${ - 1.04_{ - 0.1}^{ + 0.1}}$	${2.94}_{- 0.035}^{+ 0.035}$ ${2.94_{ - 0.035}^{ + 0.035}}$	${22.18}_{- 2.87}^{+ 2.87}$ ${22.18_{ - 2.87}^{ + 2.87}}$	${1.162}_{- 0.199}^{+ 0.199}$ ${1.162_{ - 0.199}^{ + 0.199}}$	${1.79}_{- 0.47}^{+ 0.47}$ ${1.79_{ - 0.47}^{ + 0.47}}$
6045464814730497152	$4903_{- 100}^{+ 100}$ ${4903_{ - 100}^{ + 100}}$	$- {1.05}_{- 0.1}^{+ 0.1}$ ${ - 1.05_{ - 0.1}^{ + 0.1}}$	${2.327}_{- 0.037}^{+ 0.037}$ ${2.327_{ - 0.037}^{ + 0.037}}$	${77.0}_{- 14.47}^{+ 14.47}$ ${77.0_{ - 14.47}^{ + 14.47}}$	${1.146}_{- 0.254}^{+ 0.254}$ ${1.146_{ - 0.254}^{ + 0.254}}$	${1.99}_{- 0.52}^{+ 0.52}$ ${1.99_{ - 0.52}^{ + 0.52}}$
6045487736986573056	$5085_{- 100}^{+ 100}$ ${5085_{ - 100}^{ + 100}}$	$- {1.03}_{- 0.1}^{+ 0.1}$ ${ - 1.03_{ - 0.1}^{ + 0.1}}$	${2.953}_{- 0.037}^{+ 0.037}$ ${2.953_{ - 0.037}^{ + 0.037}}$	${21.05}_{- 2.46}^{+ 2.46}$ ${21.05_{ - 2.46}^{ + 2.46}}$	${1.144}_{- 0.188}^{+ 0.188}$ ${1.144_{ - 0.188}^{ + 0.188}}$	${1.79}_{- 0.47}^{+ 0.47}$ ${1.79_{ - 0.47}^{ + 0.47}}$
6045487874425541760	$5036_{- 100}^{+ 100}$ ${5036_{ - 100}^{ + 100}}$	$- {1.02}_{- 0.1}^{+ 0.1}$ ${ - 1.02_{ - 0.1}^{ + 0.1}}$	${2.769}_{- 0.035}^{+ 0.035}$ ${2.769_{ - 0.035}^{ + 0.035}}$	${30.6}_{- 3.0}^{+ 3.0}$ ${30.6_{ - 3.0}^{ + 3.0}}$	${1.131}_{- 0.169}^{+ 0.169}$ ${1.131_{ - 0.169}^{ + 0.169}}$	${1.67}_{- 0.43}^{+ 0.43}$ ${1.67_{ - 0.43}^{ + 0.43}}$
6045477910100852992	$5021_{- 100}^{+ 100}$ ${5021_{ - 100}^{ + 100}}$	$- {0.99}_{- 0.1}^{+ 0.1}$ ${ - 0.99_{ - 0.1}^{ + 0.1}}$	${2.69}_{- 0.034}^{+ 0.034}$ ${2.69_{ - 0.034}^{ + 0.034}}$	${36.0}_{- 3.8}^{+ 3.8}$ ${36.0_{ - 3.8}^{ + 3.8}}$	${1.122}_{- 0.172}^{+ 0.172}$ ${1.122_{ - 0.172}^{ + 0.172}}$	${1.57}_{- 0.41}^{+ 0.41}$ ${1.57_{ - 0.41}^{ + 0.41}}$

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