Characterizing WASP-43b's interior structure: unveiling tidal decay and apsidal motion
arXiv:2501.03685 · doi:10.1051/0004-6361/202451994
Abstract
Context. Recent developments in exoplanetary research highlight the importance of Love numbers in understanding their internal dynamics, formation, migration history and their potential habitability. Love numbers represent crucial parameters that gauge how exoplanets respond to external forces such as tidal interactions and rotational effects. By measuring these responses, we can gain insights into the internal structure, composition, and density distribution of exoplanets. The rate of apsidal precession of a planetary orbit is directly linked to the second-order fluid Love number, thus we can gain valuable insights into the mass distribution of the planet. Aims. In this context, we aim to re-determine the orbital parameters of WASP-43b-in particular, orbital period, eccentricity, and argument of the periastron-and its orbital evolution. We study the outcomes of the tidal interaction with the host star:whether tidal decay and periastron precession are occurring in the system. Method. We observed the system with HARPS, whose data we present for the first time, and we also analyse the newly acquired JWST full-phase light curve. We fit jointly archival and new radial velocity and transit and occultation mid-times, including tidal decay, periastron precession and long-term acceleration in the system. Results. We detected a tidal decay rate of \dotP_a=(-1.99pm0.50) and a periastron precession rate of \dotomega=(0.1851+0.0070-0.0077)=(0.1727+0.0083-0.0089)deg/d=(621.72+29.88-32.04)arcsec/d. This is the first time that both periastron precession and tidal decay are simultaneously detected in an exoplanetary system. The observed tidal interactions can neither be explained by the tidal contribution to apsidal motion of a non-aligned stellar or planetary rotation axis nor by assuming non-synchronous rotation for the planet, and a value for the planetary Love number cannot be derived. [...]
17 pages, 16 figures, 11 tables
References in corpus (65)
- The Gaia mission
- The James Webb Space Telescope
- Achieving better than 1 minute accuracy in the Heliocentric and Barycentric Julian Dates
- Mass-Radius Relationships for Solid Exoplanets
- Origins of Hot Jupiters
- Internal Structure of Massive Terrestrial Planets
- Thermal structure of an exoplanet atmosphere from phase-resolved emission spectroscopy
- The GAPS Programme with HARPS-N@TNG XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets
- Parameter Estimation from Time-Series Data with Correlated Errors: A Wavelet-Based Method and its Application to Transit Light Curves
- Probing the Interiors of Very Hot Jupiters Using Transit Light Curves
- The TRAPPIST survey of southern transiting planets. I. Thirty eclipses of the ultra-short period planet WASP-43 b
- Improved Modeling of the Rossiter-McLaughlin Effect for Transiting Exoplanets
- Spitzer Phase Curve Constraints for WASP-43b at 3.6 and 4.5 microns
- WASP-43b: The closest-orbiting hot Jupiter
- The Orbit of WASP-12b is Decaying
- The Atmospheric Circulation of the Hot Jupiter WASP-43b: Comparing Three-Dimensional Models to Spectrophotometric Data
- Departure from the constant-period ephemeris for the transiting exoplanet WASP-12 b
- Exoplanet Transit Database. Reduction and processing of the photometric data of exoplanet transits
- Tidal dissipation in binary systems
- Spitzer observations of the thermal emission from WASP-43b
- A Definition for Giant Planets Based on the Mass-Density Relationship
- The continuing search for evidence of tidal orbital decay of hot Jupiters
- Radial Velocity Data Analysis with Compressed Sensing Techniques
- A comparison of gyrochronological and isochronal age estimates for transiting exoplanet host stars
- Equatorial anti-rotating day side wind flow in WASP-43b elicited by deep wind jets?
- Transit timing variations in eccentric hierarchical triple exoplanetary systems. I. Perturbations on the time-scale of the orbital period of the perturber
- The GTC exoplanet transit spectroscopy survey I: OSIRIS transmission spectroscopy of the short period planet WASP-43b
- Systematic Phase Curve Study of Known Transiting Systems from Year 1 of the TESS Mission
- The GAPS Programme with HARPS-N at TNG. XIII. The orbital obliquity of three close-in massive planets hosted by dwarf K-type stars: WASP-43, HAT-P-20 and Qatar-2
- Broad-band transmission spectrum and K-band thermal emission of WASP-43b as observed from the ground
- The Possible Orbital Decay and Transit Timing Variations of the Planet WASP-43b
- Ruling out the orbital decay of the WASP-43b
- Machine learning inference of the interior structure of low-mass exoplanets
- Ground-based detections of thermal emission from the dense hot Jupiter WASP-43b in H and Ks-bands
- An estimate of the Love number of WASP-18Ab from its radial velocity measurements
- ExoClock Project: An open platform for monitoring the ephemerides of Ariel targets with contributions from the public
- Multi-filter transit observations of WASP-39b and WASP-43b with three San Pedro Mártir telescopes
- Company for the ultra-high density, ultra-short period sub-Earth GJ 367 b: discovery of two additional low-mass planets at 11.5 and 34 days
- Transiting Exoplanet Monitoring Project (TEMP). VI. The Homogeneous Refinement of System Parameters for 39 Transiting Hot Jupiters with 127 New Light Curves
- ACCESS: A Visual to Near-infrared Spectrum of the Hot Jupiter WASP-43b with Evidence of , but no evidence of Na or K
- Examining the orbital decay targets KELT-9 b, KELT-16 b and WASP-4 b, and the transit-timing variations of HD 97658 b
- Retrieval of the dayside atmosphere of WASP-43b with CRIRES+
- A low-eccentricity migration pathway for a 13-h-period Earth analogue in a four-planet system
- Atmospheric Circulation and Thermal Phase-Curve Offset of Tidally and Non-Tidally Locked Terrestrial Exoplanets
- The phase curve and the geometric albedo of WASP-43b measured with CHEOPS, TESS and HST WFC3/UVIS
- Dynamical Measurements of the Interior Structure of Exoplanets
- Matrix-propagator approach to compute fluid Love numbers and applicability to extrasolar planets
- Multi-band transit follow up observations of five hot-Jupiters with critical noise treatments: Improved physical properties
- The power of wavelets in analysis of transit and phase curves in presence of stellar variability and instrumental noise I. Method and validation
- A Lack of Variability Between Repeated Spitzer Phase Curves of WASP-43b
- The circularization timescales of late-type binary stars
- Investigation of an orbital decay and global modeling of the planet WASP-43 b
- Star-planet tidal interaction and the limits of gyrochronology
- Constraints on TESS albedos for five hot Jupiters
- Is the orbit of the exoplanet WASP-43b really decaying? TESS and MuSCAT2 observations confirm no detection
- Power of wavelets in analyses of transit and phase curves in the presence of stellar variability and instrumental noise. II. Accuracy of the transit parameters
- Evidence of apsidal motion and a possible co-moving companion star detected in the WASP-19 system
- Photometric Follow-up Transit (Primary Eclipse) Observations of WASP-43 b and TrES-3b and A Study on Their Transit Timing Variations
- Tidal interactions shape period ratios in planetary systems with three-body resonant chains
- The apparent tidal decay of WASP-4 b can be explained by the Rømer effect
- Warm Jupiters Beyond the Tidal Synchronization Limit May Exhibit a Wide Range of Secondary Eclipse Depths
- Validation of a Third Planet in the LHS 1678 System
- The phase curve of the ultra-hot Jupiter WASP-167b as seen by TESS
- Planet-star interactions with precise transit timing. IV. Probing the regime of dynamical tides for GK host stars
- NEOSSat Observations of Three Transiting Hot Jupiters