Measured masses of sdB stars. The error bars indicate the  ± 1σ uncertainties. The 15 stars culled from our asteroseismological sample are shown by solid error bars, while the seven objects taken from Table 2 are shown by dotted error bars. The solid vertical line illustrates the peak value of the likelihood function for our full sample of 22 stars, μ = 0.4687 M_⊙, while the accompanying two sets of dotted vertical lines define the central 68.3% (inner lines) and 95.4% (outer lines) probability intervals associated with the assumed model normal distribution.