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Fig. 9


Best-fit binary fraction, velocity dispersion, and mean velocity and the log-likelihood of the best fit for five single-epoch radial velocity datasets (labeled A-E) of the O-type stars in R136, and two datasets with two epochs with a baseline of roughly one month and one year. The colors indicate the set of orbital parameter distributions assumed in the fit: blue line from Sana et al. (2012); green line from Sana et al. (2013); and red line from Kiminki & Kobulnicky (2012). The error bars show the 1σ uncertainties on the best-fit values, estimated with MCMC simulations. The dashed lines in the upper-right and lower-left panels show the values found after removing the spectroscopic binaries identified from the full multi-epoch dataset (Hénault-Brunet et al. 2012a).

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