BARNES, Rory; JACKSON, Brian; GREENBERG, Richard; RAYMOND, Sean N.; HELLER, Rene

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Pathways Towards Habitable Planets, proceedings of a workshop held 14 to 18 September 2009 in Barcelona, Spain. Edited by Vincent Coudé du Foresto, Dawn M. Gelino, and Ignasi Ribas. San Francisco: Astronomical Society of the Pacific, p.133, Pathways Towards Habitable Planets, proceedings of a workshop held 14 to 18 September 2009 in Barcelona, Spain. Edited by Vincent Coudé du Foresto, Dawn M. Gelino, and Ignasi Ribas. San Francisco: Astronomical Society of the Pacific, p.133, 2009, barcelone. 2010p. 133

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We review how tides may impact the habitability of terrestrial-like planets. If such planets form around low-mass stars, then planets in the circumstellar habitable zone will be close enough to their host stars to experience strong tidal forces. We discuss 1) decay of semi-major axis, 2) circularization of eccentric orbits, 3) evolution toward zero obliquity, 4) fixed rotation rates (not necessarily synchronous), and 5) internal heating. We briefly describe these effects using the example of a 0.25 solar mass star with a 10 Earth-mass companion. We suggest that the concept of a habitable zone should be modified to include the effects of tides.< Réduire

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Laboratoire d'Astrophysique de Bordeaux (LAB) - UMR 5804