Ariel stellar characterisation - II. Chemical abundances of carbon, nitrogen, and oxygen for 181 planet-host FGK dwarf stars

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Table 2

Coefficients of the linear regressions of abundance ratios as a function of [Fe/H] fitted to the data in Fig. 9.

[X1/X2]	a	b	p-value	N_stars
[C/O]	0.012	0.175	2.636 ×10⁻³	88
[C/N]	0.076	−0.43	<2 ×10⁻¹⁶	105
[N/O]	−0.068	0.578	4.071 × 10⁻⁹	60

Notes. Columns show the coefficients of [X1/X2] = a + b·[Fe/H], the corresponding p-values, and number of stars used for each linear regression. This number varies depending on whether it was possible to determine both X1 and X2 elements in the ratio.

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