  We perform a detailed numerical study of the equilibrium ground-state
structures of a binary rotating Bose-Einstein condensate with unequal atomic
masses. Our results show that the ground-state distribution and its related
vortex configurations are complex events that differ markedly depending
strongly on the strength of rotation frequency, as well as on the ratio of
atomic masses. We also discuss the structure and radius of the clouds, the
number and the size of the core region of the vortices, as a function of the
rotation frequency, and of the ratio of atomic masses, and the analytical
results agree well with our numerical simulations. This work may open an
alternate way in the quantum control of the binary rotating quantum gases with
unequal atomic masses.
