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

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Table 2

Kolmogorov-Smirnov (K-S) statistical test results for Mg/Si and C/O elemental ratio distributions for stars with and without planetary companions.

	${K-S}_{Whole sample}^{Low mass}$ $\[\text {K-S}_{\text {Whole sample}}^{\text {Low mass}}\]$		${K-S}_{Thin disc}^{Low mass}$ $\[\text {K-S}_{\text {Thin disc}}^{\text {Low mass}}\]$		${K-S}_{Whole sample}^{High mass}$ $\[\text{K-S}_{\text {Whole sample}}^{\text {High mass}}\]$		${K-S}_{Thin disc}^{High mass}$ $\[\text{K-S}_{\text {Thin disc}}^{\text {High mass}}\]$

	Statistic	p-value	Statistic	p-value	Statistic	p-value	Statistic	p-value
C/O_D	0.28	0.39	0.21	0.81	0.23	0.07	0.21	0.17
C/O_G	−	−	−	−	0.22	0.01	0.22	0.02
N/O_G	−	−	−	−	0.11	0.49	0.20	0.06
A(C+N+O)_G	−	−	−	−	0.14	0.24	0.23	0.02
Mg/Si	0.19	0.55	0.23	0.38	0.30	≤0.001	0.29	≤0.001

Two-sided K-S statistics test and p-values validated through 1000 bootstrap resampling iterations.

C/O_D	0.38	0.20	0.34	0.34	0.25	0.13	0.24	0.20
C/O_G	−	−	−	−	0.24	0.03	0.25	0.04
N/O_G	−	−	−	−	0.16	0.21	0.22	0.09
A(C+N+O)_G	−	−	−	−	0.18	0.14	0.25	0.05
Mg/Si	0.27	0.30	0.29	0.27	0.31	≤0.001	0.31	≤0.001

Notes. The number of determined N abundances in dwarfs is small, so N/O and A(C+N+O) tests are inconclusive, and no results are presented.

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