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   Mo[13.5]
   Di[14.5]
   Mi[15.5]
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3rd Austrian Hungarian Workshop

Andras Pal

On the stability of the habitable zones of exoplanetary systems


Since the discovery of the first planet beyond the Solar System in 1995 the number of known exoplanetary systems have increased up to 80. Studying these stars and planets is an important area of astronomical researches. One of the problems is if in the habitable zone of the studied Sun-like main-sequence stars with F and G spectral classes are there any Earth-type planets, or is there long-time stability in this zone despite the perturbations of another planet(s). In our researches we mapped the phase space structure of some exoplanetary systems by using the method of the relative finite time Lyapunov indicators and we compared the results with those obtained by other methods (long-time numerical integrations).