TOI-3362b: A Proto-Hot Jupiter Undergoing High-Eccentricity Tidal Migration
arXiv:2109.03771 · doi:10.3847/2041-8213/ac2600
Abstract
High-eccentricity tidal migration is a possible way for giant planets to be emplaced in short-period orbits. If it commonly operates, one would expect to catch proto-Hot Jupiters on highly elliptical orbits that are undergoing high-eccentricity tidal migration. As of yet, few such systems have been discovered. Here, we introduce TOI-3362b (TIC-464300749b), an 18.1-day, 5 planet orbiting a main-sequence F-type star that is likely undergoing high-eccentricity tidal migration. The orbital eccentricity is 0.815. With a semi-major axis of 0.153 au, the planet's orbit is expected to shrink to a final orbital radius of 0.051 au after complete tidal circularization. Several mechanisms could explain the extreme value of the planet's eccentricity, such as planet-planet scattering and secular interactions. Such hypotheses can be tested with follow-up observations of the system, e.g., measuring the stellar obliquity and searching for companions in the system with precise, long-term radial velocity observations. The variation in the planet's equilibrium temperature as it orbits the host star and the tidal heating at periapse make this planet an intriguing target for atmospheric modeling and observation. Because the planet's orbital period of 18.1 days is near the limit of TESS's period sensitivity, even a few such discoveries suggest that proto-Hot Jupiters may be quite common.
arXiv comment14 pages, 4 figures, 2 tables. submitted to ApJL, revised in response to referee report
References in corpus (87)
- SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
- Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
- Astropy: A Community Python Package for Astronomy
- The NumPy array: a structure for efficient numerical computation
- Gaia Data Release 2. Summary of the contents and survey properties
- Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
- The Gaia mission
- Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
- MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
- Analytic Lightcurves for Planetary Transit Searches
- Gaia Data Release 2: The astrometric solution
- MESA Isochrones and Stellar Tracks (MIST) 0: Methods for the construction of stellar isochrones
- The No-U-Turn Sampler: Adaptively Setting Path Lengths in Hamiltonian Monte Carlo
- The Dartmouth Stellar Evolution Database
- Las Cumbres Observatory Global Telescope Network
- Gaia Early Data Release 3: The astrometric solution
- Fast and scalable Gaussian process modeling with applications to astronomical time series
- Dynamical Outcomes of Planet-Planet Scattering
- Efficient, uninformative sampling of limb darkening coefficients for two-parameter laws
- The Eccentric Kozai-Lidov Effect and Its Applications
- EXOFAST: A fast exoplanetary fitting suite in IDL
- 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
- Planet Migration and Binary Companions: the case of HD 80606b
- Origins of Hot Jupiters
- A Technique for Extracting Highly Precise Photometry for the Two-Wheeled Kepler Mission
- Hot Jupiters from Secular Planet--Planet Interactions
- A Conceptual Introduction to Hamiltonian Monte Carlo
- Formation of Hot Planets by a combination of planet scattering, tidal circularization, and Kozai mechanism
- Secular Chaos and the Production of Hot Jupiters
- Evolution in Binary and Triple Stars, with an application to SS Lac
- The Equilibrium-Tide Model for Tidal Friction
- Is tidal heating sufficient to explain bloated exoplanets? Consistent calculations accounting for finite initial eccentricity
- STARRY: Analytic Occultation Light Curves
- Evidence for a systematic offset of -80 micro-arcseconds in the Gaia DR2 parallaxes
- Limb and gravity-darkening coefficients for the TESS satellite at several metallicities, surface gravities, and microturbulent velocities
- CHIRON - A Fiber Fed Spectrometer for Precise Radial Velocities
- On the Formation of Hot Jupiters in Stellar Binaries
- An ultrahot gas-giant exoplanet with a stratosphere
- Giant planets orbiting metal-rich stars show signatures of planet-planet interactions
- exoplanet: Gradient-based probabilistic inference for exoplanet data & other astronomical time series
- WASP-121 b: a hot Jupiter in a polar orbit and close to tidal disruption
- HD147506b: A Super-Massive Planet in an Eccentric Orbit Transiting a Bright Star
- Hot Jupiters from Coplanar High-eccentricity Migration
- Consequences of the Ejection and Disruption of Giant Planets
- HD 80606 b, a planet on an extremely elongated orbit
- Orbital Phase Variations of the Eccentric Giant Planet HAT-P-2b
- Steady-state planet migration by the Kozai-Lidov mechanism in stellar binaries
- Long Term Evolution of Close Planets Including the Effects of Secular Interactions
- Simulations of two-planet systems through all phases of stellar evolution: implications for the instability boundary and white dwarf pollution
- Calibration of Equilibrium Tide Theory for Extrasolar Planet Systems
- Analytic Planetary Transit Light Curves and Derivatives for Stars with Polynomial Limb Darkening
- High temperature condensate clouds in super-hot Jupiter atmospheres
- The Photoeccentric Effect and Proto-Hot Jupiters I. Measuring photometric eccentricities of individual transiting planets
- Beyond Equilibrium Temperature: How the Atmosphere/Interior Connection Affects the Onset of Methane, Ammonia, and Clouds in Warm Transiting Giant Planets
- Five Intermediate-Period Planets from the N2K Sample
- Warm Jupiters Need Close "Friends" for High-Eccentricity Migration -- A Stringent Upper Limit on the Perturber's Separation
- Optical and X-ray Transients from Planet-Star Mergers
- Minerva-Australis I: Design, Commissioning, & First Photometric Results
- Large eccentricity, low mutual inclination: the three-dimensional architecture of a hierarchical system of giant planets
- Super-Eccentric Migrating Jupiters
- EXOFASTv2: A public, generalized, publication-quality exoplanet modeling code
- Three-dimensional atmospheric circulation of hot Jupiters on highly eccentric orbits
- Measuring the Recoverability of Close Binaries in Gaia DR2 with the Robo-AO Kepler Survey
- A paucity of proto-hot Jupiters on super-eccentric orbits
- Binary deviations from single object astrometry
- SOPHIE velocimetry of Kepler transit candidates XII. KOI-1257 b: a highly eccentric three-month period transiting exoplanet
- Zodiacal Exoplanets in Time (ZEIT) VIII: A Two Planet System in Praesepe from K2 Campaign 16
- Chaotic Tides in Migrating Gas Giants: Forming Hot and Transient Warm Jupiters via High-Eccentricity Migration
- Extreme orbital evolution from hierarchical secular coupling of two giant planets
- The HARPS search for southern extra-solar planets. XXXVI. Eight HARPS multi-planet systems hosting 20 super-Earth and Neptune-mass companions
- Diffusive Tidal Evolution for Migrating hot Jupiters
- A-type Stars, the Destroyers of Worlds: The lives and deaths of Jupiters in evolving stellar binaries
- Formation of Hot Jupiters through Secular Chaos and Dynamical Tides
- The metallicity distribution and hot Jupiter rate of the Kepler field: Hectochelle High-resolution spectroscopy for 776 Kepler target stars
- A Jovian planet in an eccentric 11.5 day orbit around HD1397 discovered by TESS
- TOI-257b (HD 19916b): A Warm sub-Saturn Orbiting an Evolved F-type Star
- A well aligned orbit for the 45 Myr old transiting Neptune DS Tuc Ab
- Eating Planets for Lunch and Dinner: Signatures of Planet Consumption by Evolving Stars
- TOI-481 b & TOI-892 b: Two long period hot Jupiters from the Transiting Exoplanet Survey Satellite
- Warm Jupiters in TESS Full-Frame Images: A Catalog and Observed Eccentricity Distribution for Year 1
- Moderately Eccentric Warm Jupiters from Secular Interactions with Exterior Companions
- Thermalizing a telescope in Antarctica: Analysis of ASTEP observations
- TOI-269 b: An eccentric sub-Neptune transiting a M2 dwarf revisited with ExTrA
- Binary star influence on post-main-sequence multi-planet stability
- Kepler-1656b: a Dense Sub-Saturn With an Extreme Eccentricity
- The Origin of Kepler-419b: A Path to Tidal Migration Via Four-body Secular Interactions