Orbital evolution of circumbinary planets due to creep tides

被引:0
作者
Zoppetti, F. A. [1 ,2 ]
Folonier, H. [3 ]
Leiva, A. M. [1 ]
Gomes, G. O. [3 ]
机构
[1] Univ Nacl Cordoba, Observ Astron Cordoba, Laprida 854,X5000BGR, Cordoba, Argentina
[2] Consejo Nacl Invest Cient & Tecn, Inst Astron Teor & Expt, Laprida 854,X5000BGR, Cordoba, Argentina
[3] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, BR-05508090 Sao Paulo, SP, Brazil
基金
巴西圣保罗研究基金会;
关键词
planet-star interactions; planets and satellites; dynamical evolution and stability; celestial mechanics; CLOSE-IN SATELLITES; TIDAL EVOLUTION; KEPLER-47;
D O I
10.1051/0004-6361/202244318
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Most confirmed circumbinary planets are located very close to their host binary where the tidal forces are expected to play an important role in their dynamics. Here we consider the orbital evolution of a circumbinary planet with arbitrary viscosity, subjected to tides due to both central stars. We adopt the creep tide theory and assume that the planet is the only extended body in the system and that its orbital evolution occurs after acquiring its pseudo-synchronous stationary rotational state. With this aim, we first performed a set of numerical integrations of the tidal equations, using a Kepler-38-type system as a working example. For this case we find that the amount of planetary tidal migration and also, curiously, its direction both depend on the viscosity. However, the effect of tides on its eccentricity and pericenter evolutions is simply a move toward pure gravitational secular solutions. Then we present a secular analytical model for the planetary semimajor axis and eccentricity evolution that reproduces very well the mean behavior of the full tidal equations and provides a simple criterion to determine the migration directions of the circumbinary planets. This criterion predicts that some of the confirmed circumbinary planets are tidally migrating inward, but others are migrating outward. However, the typical timescales are predicted to be very long, and not much orbital tidal evolution is expected to have taken place in these systems. Finally, we revisit the orbital evolution of a circumbinary planet in the framework of the constant time lag model. We find that the results predicted with this formalism are identical to those obtained with creep theory in the limit of gaseous bodies.
引用
收藏
页数:14
相关论文
共 39 条
  • [1] The mass-period distribution of close-in exoplanets
    Benitez-Llambay, P.
    Masset, F.
    Beauge, C.
    [J]. ASTRONOMY & ASTROPHYSICS, 2011, 528
  • [2] Beutler G., 2005, METHODS CELESTIAL ME, V1, P99
  • [3] Secular and tidal evolution of circumbinary systems
    Correia, Alexandre C. M.
    Boue, Gwenael
    Laskar, Jacques
    [J]. CELESTIAL MECHANICS & DYNAMICAL ASTRONOMY, 2016, 126 (1-3) : 189 - 225
  • [4] Deformation and tidal evolution of close-in planets and satellites using a Maxwell viscoelastic rheology
    Correia, Alexandre C. M.
    Bouee, Gwenacl
    Laskar, Jacques
    Rodrieguez, Adrian
    [J]. ASTRONOMY & ASTROPHYSICS, 2014, 571
  • [5] Kepler-16: A Transiting Circumbinary Planet
    Doyle, Laurance R.
    Carter, Joshua A.
    Fabrycky, Daniel C.
    Slawson, Robert W.
    Howell, Steve B.
    Winn, Joshua N.
    Orosz, Jerome A.
    Prsa, Andrej
    Welsh, William F.
    Quinn, Samuel N.
    Latham, David
    Torres, Guillermo
    Buchhave, Lars A.
    Marcy, Geoffrey W.
    Fortney, Jonathan J.
    Shporer, Avi
    Ford, Eric B.
    Lissauer, Jack J.
    Ragozzine, Darin
    Rucker, Michael
    Batalha, Natalie
    Jenkins, Jon M.
    Borucki, William J.
    Koch, David
    Middour, Christopher K.
    Hall, Jennifer R.
    McCauliff, Sean
    Fanelli, Michael N.
    Quintana, Elisa V.
    Holman, Matthew J.
    Caldwell, Douglas A.
    Still, Martin
    Stefanik, Robert P.
    Brown, Warren R.
    Esquerdo, Gilbert A.
    Tang, Sumin
    Furesz, Gabor
    Geary, John C.
    Berlind, Perry
    Calkins, Michael L.
    Short, Donald R.
    Steffen, Jason H.
    Sasselov, Dimitar
    Dunham, Edward W.
    Cochran, William D.
    Boss, Alan
    Haas, Michael R.
    Buzasi, Derek
    Fischer, Debra
    [J]. SCIENCE, 2011, 333 (6049) : 1602 - 1606
  • [6] TIDAL EVOLUTION OF ASTEROIDAL BINARIES. RULED BY VISCOSITY. IGNORANT OF RIGIDITY
    Efroimsky, Michael
    [J]. ASTRONOMICAL JOURNAL, 2015, 150 (04)
  • [7] TIDAL DISSIPATION COMPARED TO SEISMIC DISSIPATION: IN SMALL BODIES, EARTHS, AND SUPER-EARTHS
    Efroimsky, Michael
    [J]. ASTROPHYSICAL JOURNAL, 2012, 746 (02)
  • [8] Tidal friction in close-in satellites and exoplanets:: The Darwin theory re-visited
    Ferraz-Mello, Sylvio
    Rodriguez, Adrian
    Hussmann, Hauke
    [J]. CELESTIAL MECHANICS & DYNAMICAL ASTRONOMY, 2008, 101 (1-2) : 171 - 201
  • [9] Tidal synchronization of close-in satellites and exoplanets: II. Spin dynamics and extension to Mercury and exoplanet host stars
    Ferraz-Mello, Sylvio
    [J]. CELESTIAL MECHANICS & DYNAMICAL ASTRONOMY, 2015, 122 (04) : 359 - 389
  • [10] The small and large lags of the elastic and anelastic tides The virtual identity of two rheophysical theories
    Ferraz-Mello, Sylvio
    [J]. ASTRONOMY & ASTROPHYSICS, 2015, 579