Vortex states in a binary mixture of Bose-Einstein condensates

The vortex configurations in the Bose-Einstein condensate of a mixture of two different spin states \F = 1,m(f)= - 1] and \2,1] of Rb-87 atoms corresponding to the recent experiments by Matthews et al. [Phys. Rev. Lett. 83, 2498 (1999)1 are considered in the framework of the Thomas-Fermi approximation as functions of N2/N1, where N-1 is the number of atoms in the state \1,- 1] and N-2 in the state \2,1]. Ranges of this ratio are determined within which the various configurations of the binary condensate are stable.