All Tables

Table 1: Journal of our red spectroscopic observations of WR 20a. The first and second columns provide the heliocentric Julian date (in the format HJD - 2 450 000) and the orbital phase computed using the ephemeris of Bonanos et al. (2004). Phase $\phi = 0.0$ corresponds to the "primary eclipse'' with the slightly less massive star in front. Columns 3 and 4 respectively indicate the grism used for the observation (see text) and the equivalent width of the H $\alpha$ emission line as integrated between 6499 and 6646 Å (see Sect. 4).
Table 2: Fundamental parameters of the WN6ha stars of WR 20a and of their stellar winds as determined from our spectral analysis. Note that the luminosity and mass-loss rate are given for a single component. The mass loss rate is based on a clumped wind model with a volume filling factor of f = 0.1.