  We explore numerically the impact of additive Gaussian noise on the
spatio-temporal dynamics of ring networks of nonlocally coupled chaotic maps.
The local dynamics of network nodes is described by the logistic map, the
Ricker map, and the Henon map. 2D distributions of the probability of observing
chimera states are constructed in terms of the coupling strength and the noise
intensity and for several choices of the local dynamics parameters. It is shown
that the coupling strength range can be the widest at a certain optimum noise
level at which chimera states are observed with a high probability for a large
number of different realizations of randomly distributed initial conditions and
noise sources. This phenomenon demonstrates a constructive role of noise in
analogy with the effects of stochastic and coherence resonance and may be
referred to as chimera resonance.
