We study the robustness of self-sustained oscillatory activity in a globally coupled ensemble of excitable and oscillatory units. The critical balance to achieve collective self-sustained oscillations is analytically established. We also report a universal scaling function for the ensemble's mean frequency. Our results extend the framework of the `Aging Transition' [Phys. Rev. Lett. 93, 104101 (2004)] including a broad class of dynamical systems potentially relevant in biology.
@article{arxiv.nlin/0512009,
title = {Universal behavior in populations composed of excitable and self-oscillatory elements},
author = {Diego Pazó and Ernest Montbrió},
journal= {arXiv preprint arXiv:nlin/0512009},
year = {2009}
}