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Table 2.

Results of the RV measurements for the sample of WC stars.

WR# Spectral type Binary status
Period e Δ RV σRV
(GCWR) GCWR This work (d) (km s−1) (km s−1)
4 WC5+? SB1, no d.e.l. Binary 10.4 2.5
5 WC6 Single 4.9 1.7
111 WC5 Single 4.9 1.6
113 WC8d+O8-9IV SB2 Binary 29.700 ± 0.001 (a) 0 (fixed) (a) 282.6 93.9
117 WC9d Single 4.5 1.5
119 WC9d Binary 11.0 3.2
135 WC8 Single 4.7 1.6
137 WC7pd+O9 SB2 Binary 4766 ± 66 (b) 0.18 ± 0.04 (b) 25.2 4.6
140 WC7pd+O4-5 SB2, VB Binary 2895.68 ± 0.17 (c) 0.8996(c) 21.6 6.5
143 WC4+Be d.e.l. Binary 11.2 4.0
146 WC6+O8 SB2, VB Binary 18.9 5.9
154 WC6 single 3.4 1.3

Notes. Δ RV Eq. (14) and σRV Eq. (13) are calculated in this work with the full spectrum as a mask and are used to classify the objects as binaries or single stars. We do not include the archival period of 2.4096 d for WR 4 due to the fact that we rule out short-scale variations (Appendix A). RV plots for the known binaries can be found in Figs. 4 and 7.

References.

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