Close binary evolution based on Gaia DR2 - The origin of late WC-type Wolf-Rayet stars with low luminosity

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Volume 657 (January 2022)

A&A, 657 (2022) A116

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Table 3.

Surface chemical abundances for ¹H, ⁴He, ¹²C, ¹⁴N, ¹⁶O and ²²Ne in mass fraction, and three abundance ratios (in number) , , and for single stars and the primary star in the binary system at selected evolutionary points.

Sequence	t (Myr)	X_¹H	Y_⁴He	log(¹²C)	log(¹⁴N)	log(¹⁶O),	log(²²Ne)
ZAMS
S1	0.000	0.725	0.261	−2.623	−3.153	−2.185	−4.039	−1.134	−0.597	−0.91
S2	0.000	0.725	0.261	−2.623	−3.153	−2.185	−4.039	−1.134	−0.597	−0.91
B1	0.000	0.725	0.261	−2.623	−3.153	−2.185	−4.039	−1.134	−0.597	−0.91
B2	0.000	0.725	0.261	−2.623	−3.153	−2.185	−4.039	−1.134	−0.597	−0.91
B3	0.000	0.725	0.261	−2.623	−3.153	−2.185	−4.039	−1.134	−0.597	−0.91

ECHB
S1	6.368	0.725	0.261	−2.623	−3.153	−2.185	−3.960	−1.134	0.253	−0.91
S2	6.724	0.702	0.284	−2.951	−2.436	−2.319	−4.276	−1.449	2.806	−0.06
B1	6.638	0.575	0.411	−4.022	−2.083	−3.016	−6.209	−3.301	1.872	0.99
B2	6.840	0.692	0.294	−3.003	−2.372	−2.365	−4.421	−1.515	0.564	0.05
B3	6.955	0.675	0.311	−3.062	−2.311	−2.424	−4.494	−1.588	0.684	0.17

ECHEB
S1	6.877	0.183	0.804	−4.002	−2.053	−3.539	−7.080	−4.241	76.114	1.54
S2	7.244	0.000	0.972	−2.222	−1.886	−2.524	−3.396	−0.551	1.859	0.69
B1	7.179	0.000	0.347	−0.297	−17.917	−0.886	−1.868	1.042	−17.688	−16.97
B2	7.349	0.000	0.263	−0.285	−17.676	−0.700	−1.872	1.006	−17.459	−16.92
B3	7.473	0.000	0.960	−1.699	−2.078	−2.219	−3.119	−0.196	−0.446	0.20

ECCB
S1	6.877	0.182	0.804	−4.002	−2.053	−3.539	−7.080	−4.242	76.111	1.54
S2	7.244	0.000	0.972	−2.220	−1.886	−2.523	−3.395	−0.550	1.849	0.69
B1	7.179	0.000	0.347	−0.297	−17.917	−0.886	−1.868	1.042	−17.687	−16.97
B2	7.349	0.000	0.263	−0.285	−17.676	−0.699	−1.872	1.006	−17.458	−16.92
B3	7.473	0.000	0.960	−1.699	−2.078	−2.219	−3.119	−0.196	−0.446	0.20

BROLF1
B1	5.971	0.713	0.273	−2.809	−2.592	−2.258	−4.223	−1.318	0.150	−0.28
B2	6.848	0.692	0.294	−3.003	−2.372	−2.365	−4.421	−1.515	0.564	0.05
B3	6.967	0.675	0.311	−3.067	−2.308	−2.427	−4.499	−1.592	0.691	0.18

EROLF1
B1	6.386	0.621	0.366	−3.616	−2.144	−2.705	−5.067	−2.160	1.405	0.62
B2	6.856	0.342	0.645	−3.961	−2.055	−3.499	−6.709	−3.796	1.839	1.50
B3	6.977	0.594	0.392	−3.205	−2.217	−2.563	−4.659	−1.751	0.921	0.41

BROLF2
B1	6.453	0.593	0.394	−3.941	−2.095	−2.926	−5.774	−2.866	1.780	0.89

EROLF2
B1	6.614	0.577	0.410	−4.020	−2.084	−3.011	−6.187	−3.279	1.869	0.99

BROLF3
B1	6.646	0.575	0.412	−4.023	−2.083	−3.018	−6.216	−3.308	1.873	0.99

EROLF3
B1	6.663	0.233	0.753	−3.975	−2.053	−3.585	−6.522	−3.607	1.855	1.59

Notes. Other abbreviations are the same as Table 2.

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