Star formation in Taurus-Auriga: The high-mass stars

We consider the question of whether the star formation in the Tau-Aur clouds produces low-mass stars exclusively. If there are of order 10³ low-mass members of the association, then there will be approximately 50 B stars in the association if the field star initial mass function (IMF) extends to 0.2 M_⊙. We identify 29 B stars as possible kinematic members of the T association, and argue that the data are consistent with the existence of a single IMF generating the low and high-mass stars. We conclude that (1) the Tau-Aur T association is related to the Cas-Tau OB association, and (2) there is no evidence that the association IMF differs from the field star IMF.