Table 4: Alfvén radii $r_{\rm A}$ and velocities Ar obtained with the Weber & Davis model for the two stars HD 46375 and $\upsilon $ And. The stellar winds were modeled for different magnetic field strengths B0at the coronal base, rotation periods  $P_{\rm {rot}}$ and coronal temperatures T as given in the table. In addition, the wind velocities at 1 AU $v_{r,{\rm 1~AU}}$ are given.
  B0 [10-4 T] 1 1 10 10
  $P_{\rm {rot}}$ [d] 3 30 3 30
  T [106 K] 0.5
  $r_{\rm A}$ [AU] 0.07 0.08 0.33 0.52
HD 46375 Ar [km s-1] 178 133 706 288
  $v_{r,{\rm 1~AU}}$ [km s-1] 387 313 938 332
  $r_{\rm A}$ [AU] 0.09 0.09 0.54 0.71
$\upsilon $ And Ar [km s-1] 468 442 1218 696
  $V_{r,{\rm 1~AU}}$ [km s-1] 4467 292 1351 339
  T [106 K] 2.0
  $r_{\rm A}$ [AU] 0.04 0.04 0.31 0.35
HD 46375 Ar [km s-1] 409 401 846 660
  $v_{r,{\rm 1~AU}}$ [km s-1] 777 762 1090 765
  $r_{\rm A}$ [AU] 0.12 0.15 0.56 1.01
$\upsilon $ And Ar [km s-1] 263 156 1129 340
  $v_{r,{\rm 1~AU}}$ [km s-1] 775 723 1450 731


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