Table 5: The distribution of companion stars over angular separation $\rho $ and $K_{\rm S}$ magnitude for our sample of 31 targets with multi-color observations. Each entry lists the number of confirmed companion stars, i.e., the secondaries with $\chi ^2 < 2.30$. Between brackets we list the number of candidate companion stars, which have $2.30 < \chi ^2 < 11.8$. We have also included the candidate companion HIP 80142-2 ( $\rho =5.88''$), for which no $K_{\rm S}$ measurement is available. Several candidate companions are likely to be background stars, especially faint candidates at large separation. In the region $1'' \leq \rho \leq 4''$ and $12~{\rm mag} \leq K_{\rm S} \leq 14$ mag (which we will study in Sect. 6) we find one confirmed companion and no candidate companions.
  $\rho < 1''$ $1'' \leq \rho \leq 4''$ $\rho > 4''$ Total
$K_{\rm S}<12$ mag 9 (-) 10 (2) 4 (2) 23 (4)
$12 \leq K_{\rm S} \leq 14$ mag - (-) 1 (-) - (1) 1 (1)
$K_{\rm S} > 14$ mag - (-) - (3) 1 (3) 1 (6)
no $K_{\rm S}$ available - (-) - (-) - (1) - (1)
Total 9 (-) 11 (5) 5 (7) 25 (12)


Source LaTeX | All tables | In the text