Allowed configurations for companions for a1, a2, a3, and c using the RV measurements for the N IV λ4058 line. The panels for a1, a2, and a3, which were not classified as binaries here, show the probability of a binary with the given M₂, P producing values of ∆RV_pp‚σ and ∆RV_pp below our observed values. The 5% and 50% thresholds are marked. For star c, which is classified as a binary here, we show the probability that a binary in the given configuration would reproduce the observed ∆RV_pp within . Only 5% thresholds are marked, for the sake of clarity (see the main text for details).