Dynamical Habitability of Planetary Systems

Rudolf Dvorak , Elke Pilat-Lohinger , Eric Bois (1, 2) , Richard Schwarz , Barbara Funk , Charles Beichman (3) , William Danchi (4) , Carlos Eiroa (5) , Malcolm Fridlund (6) , Thomas Henning (7) , Tom Herbst (7) , Lisa Kaltenegger (8) , Helmut Lammer (9) , Alain Léger , René Liseau (10) , Jonathan Lunine (11) , Francesco Paresce (12) , Alan Penny (13) , Andreas Quirrenbach (14) , Huub Röttgering (15) , Franck Selsis (16, 17, 18, 19) , Jean Schneider (20) , Daphne Stam (21) , Giovanna Tinetti (22) , Glenn J. White (13, 23)

1 CASSIOPEE - Laboratoire de Cosmologie, Astrophysique Stellaire & Solaire, de Planétologie et de Mécanique des Fluides
2 OCA - Observatoire de la Côte d'Azur
3 NExScI - NASA ExoPlanet Science Institute
4 GSFC - NASA Goddard Space Flight Center
5 UAM - Universidad Autónoma de Madrid
6 RSSD - Research and Scientific Support Department, ESTEC
7 MPIA - Max-Planck-Institut für Astronomie
8 CfA - Harvard-Smithsonian Center for Astrophysics
9 IWF - Space Research Institute of Austrian Academy of Sciences
10 Department of Radio and Space Science [Göteborg]
11 LPL - Lunar and Planetary Laboratory [Tucson]
12 INAF - Istituto Nazionale di Astrofisica
13 RAL - STFC Rutherford Appleton Laboratory
14 LSW - Landessternwarte Königstuhl [ZAH]
15 Leiden Observatory [Leiden]
16 OASU - Observatoire aquitain des sciences de l'univers
17 LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
18 UB - Université Sciences et Technologies - Bordeaux 1
19 L3AB - Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux
20 OBSPM - Observatoire de Paris - Site de Meudon
21 SRON - SRON Netherlands Institute for Space Research
22 UCL - University College of London [London]
23 Department of Physics and Astronomy [Milton Keynes]

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).

Domaines: Planétologie et astrophysique de la terre [astro-ph.EP]; Planétologie et astrophysique de la terre [astro-ph.EP]

Rudolf Dvorak, Elke Pilat-Lohinger, Eric Bois, Richard Schwarz, Barbara Funk, et al.. Dynamical Habitability of Planetary Systems. Astrobiology, 2010, 10, pp.33-43. ⟨10.1089/AST.2009.0379⟩. ⟨hal-00522625⟩