  The dynamics of two symmetrically coupled populations of rotators is studied
for different values of the inertia. The system is characterized by different
types of solutions, which all coexist with the fully synchronized state. At
small inertia the system is no more chaotic and one observes mainly quasi-
periodic chimeras, while the usual (stationary) chimera state is not anymore
observable. At large inertia one observes two different kind of chaotic
solutions with broken symmetry: the intermittent chaotic chimera, characterized
by a synchronized population and a population displaying a turbulent behaviour,
and a second state where the two populations are both chaotic but whose
dynamics adhere to two different macroscopic attractors. The intermittent
chaotic chimeras are characterized by a finite life-time, whose duration
increases as a power-law with the system size and the inertia value. Moreover,
the chaotic population exhibits clear intermittent behavior, displaying a
laminar phase where the two populations tend to synchronize, and a turbulent
phase where the macroscopic motion of one population is definitely erratic. In
the thermodynamic limit these states survive for infinite time and the laminar
regimes tends to disappear, thus giving rise to stationary chaotic solutions
with broken symmetry contrary to what observed for chaotic chimeras on a ring
geometry.
