  Let K be a simple and simply connected compact Lie group. We call a (twisted)
quasi-Hamiltonian K-manifold M a quasi-Hamiltonian model space if it is
multiplicity free and its momentum map is surjective. We explicitly identify
the subgroups of the Lie algebra of the maximal torus of K, which, by F. Knop's
classification of multiplicity free quasi-Hamiltonian manifolds, are in
one-to-one correspondence with the isomorphism classes of quasi-Hamiltonian
model K-spaces.
