TOI-4562 b: A highly eccentric temperate Jupiter analog orbiting a young field star

Abstract

We report the discovery of TOI-4562 b (TIC-349576261), a Jovian planet orbiting a young F7V-type star, younger than the Praesepe/Hyades clusters (< $700$ Myr). This planet stands out because of its unusually long orbital period for transiting planets with known masses ($P_{\mathrm{orb}}$ = $225.11781_{-0.00022}^{+0.00025}$ days), and because it has a substantial eccentricity ($e$ = $0.76_{-0.02}^{+0.02}$). The location of TOI-4562 near the southern continuous viewing zone of TESS allowed observations throughout 25 sectors, enabling an unambiguous period measurement from TESS alone. Alongside the four available TESS transits, we performed follow-up photometry using the South African Astronomical Observatory node of the Las Cumbres Observatory, and spectroscopy with the CHIRON spectrograph on the 1.5 m SMARTS telescope. We measure a radius of $1.118_{+0.013}^{-0.014}$ $R_{\mathrm{J}}$ and a mass of $2.30_{-0.47}^{+0.48}$ $M_{\mathrm{J}}$ for TOI-4562 b. The radius of the planet is consistent with contraction models describing the early evolution of the size of giant planets. We detect tentative transit timing variations at the $\sim$ 20 min level from five transit events, favouring the presence of a companion that could explain the dynamical history of this system if confirmed by future follow-up observations. With its current orbital configuration, tidal timescales are too long for TOI-4562 b to become a hot-Jupiter via high eccentricity migration, though it is not excluded that interactions with the possible companion could modify TOI-4562 b eccentricity and trigger circularization. The characterisation of more such young systems is essential to set constraints on models describing giant planet evolution.

24 pages, 12 figures, 4 tables. Accepted in The Astronomical Journal (24/01/2023)

References in corpus (118)

• Array Programming with NumPy
• Astropy: A Community Python Package for Astronomy
• emcee: The MCMC Hammer
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• The Gaia mission
• Modules for Experiments in Stellar Astrophysics (MESA)
• The Transiting Exoplanet Survey Satellite
• Modules for Experiments in Stellar Astrophysics (MESA): Giant Planets, Oscillations, Rotation, and Massive Stars
• Correcting for the Effects of Interstellar Extinction
• Modules for Experiments in Stellar Astrophysics (MESA): Binaries, Pulsations, and Explosions
• MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
• Analytic Lightcurves for Planetary Transit Searches
• The generalised Lomb-Scargle periodogram. A new formalism for the floating-mean and Keplerian periodograms
• Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 20945
• Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics
• The PLATO 2.0 Mission
• The WASP Project and the SuperWASP Cameras
• Las Cumbres Observatory Global Telescope Network
• Gaia Early Data Release 3: The astrometric solution
• batman: BAsic Transit Model cAlculatioN in Python
• Fast and scalable Gaussian process modeling with applications to astronomical time series
• Gaia Early Data Release 3: Parallax bias versus magnitude, colour, and position
• Planetary Radii across Five Orders of Magnitude in Mass and Stellar Insolation: Application to Transits
• A box-fitting algorithm in the search for periodic transits
• Dynamical Outcomes of Planet-Planet Scattering
• Ages for illustrative field stars using gyrochronology: viability, limitations and errors
• The Eccentric Kozai-Lidov Effect and Its Applications
• EXOFAST: A fast exoplanetary fitting suite in IDL
• The TESS Input Catalog and Candidate Target List
• 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
• The GALAH+ Survey: Third Data Release
• Origins of Hot Jupiters
• A Technique for Extracting Highly Precise Photometry for the Two-Wheeled Kepler Mission
• The Ages of Stars
• Formation of Hot Planets by a combination of planet scattering, tidal circularization, and Kozai mechanism
• RadVel: The Radial Velocity Modeling Toolkit
• BANYAN. XI. The BANYAN $\Sigma$ multivariate Bayesian algorithm to identify members of young associations within 150 pc
• Secular Chaos and the Production of Hot Jupiters
• Revised Catalog of GALEX Ultraviolet Sources. I. The All-sky Survey: GUVcat_AIS
• The TESS Objects of Interest Catalog from the TESS Prime Mission
• Evolution of "51Peg b-like" Planets
• Rotation and differential rotation of active Kepler stars
• Structure and evolution of super-Earth to super-Jupiter exoplanets: I. heavy element enrichment in the interior
• Kepler Data Validation I -- Architecture, Diagnostic Tests, and Data Products for Vetting Transiting Planet Candidates
• 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
• Inflating Hot Jupiters With Ohmic Dissipation
• A spin-down clock for cool stars from observations of a 2.5-billion-year-old cluster
• Real-time processing of the imaging data from the network of Las Cumbres Observatory Telescopes using BANZAI
• Kepler Data Validation II -- Transit Model Fitting and Multiple-Planet Search
• A planet within the debris disk around the pre-main-sequence star AU Microscopii
• SOAR TESS Survey. I: Sculpting of TESS planetary systems by stellar companions
• CERES: A Set of Automated Routines for Echelle Spectra
• Stellar activity of planetary host star HD 189733
• Rotation in the Pleiades with K2: I. Data and First Results
• Untangling the Galaxy I: Local Structure and Star Formation History of the Milky Way
• A Guide to Realistic Uncertainties on Fundamental Properties of Solar-Type Exoplanet Host Stars
• A new library of theoretical stellar spectra with scaled-solar and alpha-enhanced mixtures
• Ten years of speckle interferometry at SOAR
• The ASAS-SN Catalog of Variable Stars III: Variables in the Southern TESS Continuous Viewing Zone
• TESS Hunt for Young and Maturing Exoplanets (THYME): A planet in the 45 Myr Tucana-Horologium association
• On the Relation Between Hot Jupiters & the Roche Limit
• K2 rotation periods for low-mass Hyads and a quantitative comparison of the distribution of slow rotators in the Hyades and Praesepe
• Comoving stars in Gaia DR1: An abundance of very wide separation co-moving pairs
• Four newborn planets transiting the young solar analog V1298 Tau
• A Temporary Epoch of Stalled Spin-Down for Low-Mass Stars: Insights from NGC 6811 with Gaia and Kepler
• On the Inference of a Star's Inclination Angle from its Rotation Velocity and Projected Rotation Velocity
• WIYN Open Cluster Study. LXXV. Testing the Metallicity Dependence of Stellar Lithium Depletion Using Hyades-Aged Clusters. 1. Hyades & Praesepe
• Warm Jupiters Need Close "Friends" for High-Eccentricity Migration -- A Stringent Upper Limit on the Perturber's Separation
• On the competing effect of wind braking and interior coupling in the rotational evolution of solar-like stars
• Large eccentricity, low mutual inclination: the three-dimensional architecture of a hierarchical system of giant planets
• TESS Hunt for Young and Maturing Exoplanets (THYME) II: A 17 Myr Old Transiting Hot Jupiter in the Sco-Cen Association
• Eccentric Jupiters via Disk-Planet Interactions
• K2 Rotation Periods for low-mass Hyads and the Implications for Gyrochronology
• A paucity of proto-hot Jupiters on super-eccentric orbits
• TESS Hunt for Young and Maturing Exoplanets (THYME) III: a two-planet system in the 400 Myr Ursa Major Group
• Characterizing Distant Worlds with Asterodensity Profiling
• The Solar Neighborhood XLIX: Nine Giant Planets Orbiting Nearby K Dwarfs, and the CHIRON Spectrograph's Radial Velocity Performance
• The lithium-rotation connection in the 125 Myr-old Pleiades cluster
• A warm Jupiter-sized planet transiting the pre-main sequence star V1298 Tau
• TESS Hunt for Young and Maturing Exoplanets (THYME) VI: an 11 Myr giant planet transiting a very low-mass star in Lower Centaurus Crux
• ZASPE: A Code to Measure Stellar Atmospheric Parameters and their Covariance from Spectra
• Dynamical Interactions Make Hot Jupiters in Open Star Clusters
• Limits on the Spin-Orbit Angle and Atmospheric Escape for the 22 Myr-old Planet AU Mic b
• Investigating hot-Jupiter inflated radii with hierarchical Bayesian modelling
• Rapid contraction of giant planets orbiting the 20 million-years old star V1298 Tau
• The Equilibrium Temperature of Planets in Elliptical Orbits
• TESS Hunt for Young and Maturing Exoplanets (THYME) V: A Sub-Neptune Transiting a Young Star in a Newly Discovered 250 Myr Association
• Cluster Difference Imaging Photometric Survey. II. TOI 837: A Young Validated Planet in IC 2602
• Secular dynamics of multiplanet systems: implications for the formation of hot and warm Jupiters via high-eccentricity migration
• Two young planetary systems around field stars with ages between 20-320 Myr from TESS
• SOAR TESS Survey. II: The impact of stellar companions on planetary populations
• NGTS clusters survey. I. Rotation in the young benchmark open cluster Blanco 1
• Transmission spectroscopy and Rossiter-McLaughlin measurements of the young Neptune orbiting AU Mic
• A Relationship Between Stellar Age and Spot Coverage
• The Photoeccentric Effect and Proto-Hot Jupiters II. KOI-1474.01, a candidate eccentric planet perturbed by an unseen companion
• Analysis of membership probability in nearby young moving groups with Gaia DR2
• Eccentricity Evolution of Extrasolar Multiple Planetary Systems due to the Depletion of Nascent Protostellar Disks
• BAFFLES: Bayesian Ages for Field Lower-Mass Stars
• Spin-orbit alignment and magnetic activity in the young planetary system AU Mic
• A well aligned orbit for the 45 Myr old transiting Neptune DS Tuc Ab
• True masses of the long-period companions to HD 92987 and HD 221420 from Hipparcos-Gaia astrometry
• Thermalizing a telescope in Antarctica: Analysis of ASTEP observations
• The TESS-Keck Survey. VIII. Confirmation of a Transiting Giant Planet on an Eccentric 261 day Orbit with the Automated Planet Finder Telescope
• Revisiting migration in a disc cavity to explain the high eccentricities of warm Jupiters
• On the Correlation between Hot Jupiters and Stellar Clustering: High-eccentricity Migration Induced by Stellar Flybys
• Gyrochronological dating of the stellar moving group Group X
• TESS Hunt for Young and Maturing Exoplanets (THYME) VII : Membership, rotation, and lithium in the young cluster Group-X and a new young exoplanet
• A Mini-Neptune from TESS and CHEOPS Around the 120 Myr Old AB Dor member HIP 94235
• The obliquity of HIP 67522 b: a 17 Myr old transiting hot Jupiter-sized planet
• TOI-942b: A Prograde Neptune in a ~60 Myr old Multi-transiting System
• NEID Rossiter-McLaughlin Measurement of TOI-1268b: A Young Warm Saturn Aligned with Its Cool Host Star
• A 38 Million Year Old Neptune-Sized Planet in the Kepler Field
• The Young Planet DS Tuc Ab has a Low Obliquity
• TOI-1268b: the youngest, hot, Saturn-mass transiting exoplanet

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• Examining the detectability of ringing on highly eccentric exoplanets