Dynamical Habitability of Planetary Systems

Details Dynamical Habitability of Planetary Systems Dynamical Habitability of Planetary Systems

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010asbio..10...33d&link_type=abstract

Astrobiology, Volume 10, Issue 1, pp. 33-43.

Biology

4

Scientific paper

The problem of the stability of planetary systems, a question that concerns only multiplanetary systems that host at least two planets, is discussed. The problem of mean motion resonances is addressed prior to discussion of the dynamical structure of the more than 350 known planets. The difference with regard to our own Solar System with eight planets on low eccentricity is evident in that 60% of the known extrasolar planets have orbits with eccentricity e > 0.2. We theoretically highlight the studies concerning possible terrestrial planets in systems with a Jupiter-like planet. We emphasize that an orbit of a particular nature only will keep a planet within the habitable zone around a host star with respect to the semimajor axis and its eccentricity. In addition, some results are given for individual systems (e.g., Gl777A) with regard to the stability of orbits within habitable zones. We also review what is known about the orbits of planets in double-star systems around only one component (e.g., gamma Cephei) and around both stars (e.g., eclipsing binaries).

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