Chemical composition of planetary hosts - C, N, and α-element abundances

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Table 3

Anderson-Darling (A-D) statistical test results for Mg/Si and C/O elemental ratio distributions for stars with and without planetary companions.

	${A-D}_{Whole sample}^{Low mass}$ $\[\text {A-D}_{\text {Whole sample}}^{\text {Low mass}}\]$		${A-D}_{Thin disc}^{Low mass}$ $\[\text {A-D}_{\text {Thin disc}}^{\text {Low mass}}\]$		${AD}_{Whole sample}^{High mass}$ $\[\text{AD}_{\text {Whole sample}}^{\text {High mass}}\]$		${A-D}_{Thin disc}^{High mass}$ $\[\text{A-D}_{\text {Thin disc}}^{\text {High mass}}\]$

	Statistic	p-value	Statistic	p-value	Statistic	p-value	Statistic	p-value
C/O_D	0.42	0.22	−0.45	≥0.25	1.71	0.06	1.07	0.12
C/O_G	−	−	−	−	4.19	0.01	3.72	0.01
N/O_G	−	−	−	−	−0.56	≥0.25	1.20	0.10
A(C+N+O)_G	−	−	−	−	1.15	0.11	4.41	0.01
Mg/Si	−0.42	≥0.25	0.32	≥0.25	29.82	≤0.001	24.87	≤0.001

Two-sided A-D statistics test values validated through 1000 bootstrap resampling.

C/O_D	1.64	0.14	0.70	0.18	3.00	0.09	2.45	0.10
C/O_G	−	−	−	−	5.72	0.02	5.31	0.03
N/O_G	−	−	−	−	0.76	0.17	2.35	0.09
A(C+N+O)_G	−	−	−	−	2.35	0.10	5.84	0.03
Mg/Si	0.87	0.17	1.95	0.13	31.17	≤0.001	26.15	≤0.001

Notes. The critical value of a 5% significance level for the A-D statistics is determined to be 1.961. The elemental C/O and N/O ratios in dwarfs are inconclusive, and no results are presented.

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