Revisiting TrES-5 b: departure from a linear ephemeris instead of short-period transit timing variation
arXiv:2110.14294 · doi:10.1051/0004-6361/202142424
Abstract
The orbital motion of the transiting hot Jupiter TrES-5 b was reported to be perturbed by a planetary companion on a nearby orbit. Such compact systems do not frequently occur in nature, and learning their orbital architecture could shed some light on hot Jupiters' formation processes. We acquired fifteen new precise photometric time series for twelve transits of TrES-5 b between June 2019 and October 2020 using 0.9-2.0 m telescopes. The method of precise transit timing was employed to verify the deviation of the planet from the Keplerian motion. Although our results show no detectable short-time variation in the orbital period of TrES-5 b and the existence of the additional nearby planet is not confirmed, the new transits were observed about two minutes earlier than expected. We conclude that the orbital period of the planet could vary in a long timescale. We found that the most likely explanation of the observations is the line-of-sight acceleration of the system's barycentre due to the orbital motion induced by a massive, wide-orbiting companion.
arXiv commentAccepted for publication in A&A
References in corpus (24)
- Intrinsic Colors, Temperatures, and Bolometric Corrections of Pre-Main Sequence Stars
- Analytic Lightcurves for Planetary Transit Searches
- AstroImageJ: Image Processing and Photometric Extraction for Ultra-Precise Astronomical Light Curves (Expanded Edition)
- AstroImageJ: Image Processing and Photometric Extraction for Ultra-Precise Astronomical Light Curves
- Ten New and Updated Multi-planet Systems, and a Survey of Exoplanetary Systems
- 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
- WASP-47: A Hot Jupiter System with Two Additional Planets Discovered by K2
- Kepler constraints on planets near hot Jupiters
- Probing the Interiors of Very Hot Jupiters Using Transit Light Curves
- A First Comparison of Kepler Planet Candidates in Single and Multiple Systems
- The Orbit of WASP-12b is Decaying
- Systemic: A Testbed For Characterizing the Detection of Extrasolar Planets. I. The Systemic Console Package
- Departure from the constant-period ephemeris for the transiting exoplanet WASP-12 b
- Transit Analysis Package (TAP and autoKep): IDL Graphical User Interfaces for Extrasolar Planet Transit Photometry
- Orbital decay of hot Jupiters due to nonlinear tidal dissipation within solar-type hosts
- Long-Term Transit Timing Monitoring and Refined Light Curve Parameters of HAT-P-13b
- WASP-4b Arrived Early for the TESS Mission
- TESS spots a hot Jupiter with an inner transiting Neptune
- Kepler-730: A hot Jupiter system with a close-in, transiting, Earth-sized planet
- WASP-4 is Accelerating Toward the Earth
- TrES-5: A Massive Jupiter-sized Planet Transiting A Cool G-dwarf
- High-precision multi-band time-series photometry of exoplanets Qatar-1b and TrES-5b
- Transit timing analysis of the exoplanet TrES-5 b. Possible existence of the exoplanet TrES-5 c