On the influence of equilibrium tides on transit-timing variations of close-in super-Earths. I. Application to single-planet systems and the case of K2-265 b
arXiv:2104.13808 · doi:10.1051/0004-6361/202040202
Abstract
In this work, we investigate the influence of planetary tidal interactions on the transit-timing variations of short-period low-mass rocky exoplanets. For such purpose, we employ the recently-developed creep tide theory to compute tidally-induced TTVs. We implement the creep tide in the recently-developed Posidonius N-body code, thus allowing for a high-precision evolution of the coupled spin-orbit dynamics of planetary systems. As a working example for the analyses of tidally-induced TTVs, we apply our version of the code to the K2-265 b planet. We analyse the dependence of tidally-induced TTVs with the planetary rotation rate, uniform viscosity coefficient and eccentricity. Our results show that the tidally-induced TTVs are more significant in the case where the planet is trapped in non-synchronous spin-orbit resonances, in particular the 3/2 and 2/1 spin-orbit resonant states. An analysis of the TTVs induced separately by apsidal precession and tidally-induced orbital decay has allowed for the conclusion that the latter effect is much more efficient at causing high-amplitude TTVs than the former effect by 2 - 3 orders of magnitude. We compare our findings for the tidally-induced TTVs obtained with Posidonius with analytical formulations for the transit timings used in previous works, and verified that the results for the TTVs coming from Posidonius are in excellent agreement with the analytical formulations. These results show that the new version of Posidonius containing the creep tide theory implementation can be used to study more complex cases in the future. For instance, the code can be used to study multiplanetary systems, in which case planet-planet gravitational perturbations must be taken into account additionally to tidal interactions to obtain the TTVs.
arXiv comment12 pages, 9 figures. Accepted with minor revisions in Astronomy and Astrophysics (A&A)
References in corpus (39)
- Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1
- The California-Kepler Survey. III. A Gap in the Radius Distribution of Small Planets
- The false positive rate of Kepler and the occurrence of planets
- DHP Framework: Digital Health Passports Using Blockchain -- Use case on international tourism during the COVID-19 pandemic
- On detecting terrestrial planets with timing of giant planet transits
- IAS15: A fast, adaptive, high-order integrator for gravitational dynamics, accurate to machine precision over a billion orbits
- The Transiting Exoplanet Survey Satellite: Simulations of planet detections and astrophysical false positives
- WHFast: A fast and unbiased implementation of a symplectic Wisdom-Holman integrator for long term gravitational simulations
- WASP-12b: The hottest transiting planet yet discovered
- Extracting Planet Mass and Eccentricity From TTV data
- Probing the Interiors of Very Hot Jupiters Using Transit Light Curves
- The Exoplanet Census: A General Method, Applied to Kepler
- The Apparently Decaying Orbit of WASP-12
- The Orbit of WASP-12b is Decaying
- Tidal dissipation compared to seismic dissipation: in small bodies, in earths, and in superearths
- TESS Discovery of an ultra-short-period planet around the nearby M dwarf LHS 3844
- Eleven Multi-planet Systems from K2 Campaigns 1 & 2 and the Masses of Two Hot Super-Earths
- Deformation and tidal evolution of close-in planets and satellites using a Maxwell viscoelastic rheology
- Tidal synchronization of close-in satellites and exoplanets. A rheophysical approach
- A pair of TESS planets spanning the radius valley around the nearby mid-M dwarf LTT 3780
- No pseudosynchronous rotation for terrestrial planets and moons
- The CARMENES search for exoplanets around M dwarfs. Two planets on the opposite sides of the radius gap transiting the nearby M dwarf LTT 3780
- Kepler-93b: A Terrestrial World Measured to within 120 km, and a Test Case for a New Spitzer Observing Mode
- A hot terrestrial planet orbiting the bright M dwarf L 168-9 unveiled by TESS
- Dynamics and Transit Variations of Resonant Exoplanets
- Tidal synchronization of close-in satellites and exoplanets. II. Spin dynamics and extension to Mercury and exoplanets host stars
- Characterization of the K2-38 planetary system. Unraveling one of the densest planets known to date
- Solid tidal friction in multi-layer planets: Application to Earth, Venus, a Super Earth and the TRAPPIST-1 planets. Can a multi-layer planet be approximated as a homogeneous planet?
- A study of symplectic integrators for planetary system problems: error analysis and comparisons
- K2-265 b: A Transiting Rocky Super-Earth
- On the impact of tides on the transit-timing fits to the TRAPPIST-1 system
- Tidal synchronization of close-in satellites and exoplanets. III. Tidal dissipation revisited and application to Enceladus
- Spin-orbit coupling for close-in planets
- Dissipation in a tidally perturbed body librating in longitude
- Spin dynamics of close-in planets exhibiting large TTVs
- Thermal and orbital evolution of low-mass exoplanets
- Coupled orbital and spin evolution of the CoRoT-7 two-planet system using a Maxwell viscoelastic rheology
- WASP-12b: A Mass-Losing Extremely Hot Jupiter
- Rotation and figure evolution in the creep tide theory. A new approach and application to Mercury