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With improvements in exoplanet detection techniques, the number of multipleplanet systems discovered is increasing, while the detection of potentiallyhabitable Earth-mass planets remains complicated and thus requires new searchstrategies. Dynamical studies of known multiple planet systems are therefore avital tool in the search for stable and habitable planet candidates. Here, wepresent a dynamical study of the three-planet system HD 204313 to determinewhether it could harbour an Earth-like planet within its habitable zone for asufficient time to develop life. We found two semi-stable regions in thesystem, but neither prove stable for long enough for a terrestrial planet todevelop life. Our investigations suggest that overlapping weak and high orderresonances may be responsible for these semi-stable regions. This studyestablished a framework for a larger project that will study the dynamicalstability of the habitable zone of multiple planet systems, providing a list ofinteresting targets for future habitable low-mass planet searches.

A dynamical test for terrestrial planets in the habitable zone of HD 204313