A transiting warm giant planet around the young active star TOI-201

Abstract

We present the confirmation of the eccentric warm giant planet TOI-201 b, first identified as a candidate in \textit{TESS} photometry (Sectors 1-8, 10-13, and 27-28) and confirmed using ground-based photometry from NGTS and radial velocities from FEROS, HARPS, CORALIE, and \textsc{Minerva}-Australis. TOI-201 b orbits a young ($0.87_{-0.49}^{+0.46}\mathrm{Gyr}$) and bright(V=9.07 mag) F-type star with a $52.9781\mathrm{d}$ period. The planet has a mass of $0.42_{-0.03}^{+0.05}{\mathrm{M}}_{\mathrm{J}}$, a radius of $1.008_{-0.015}^{+0.012}{\mathrm{R}}_{\mathrm{J}}$, and an orbital eccentricity of $0.28_{-0.09}^{+0.06}$; it appears to still be undergoing fairly rapid cooling, as expected given the youth of the host star. The star also shows long-term variability in both the radial velocities and several activity indicators, which we attribute to stellar activity. The discovery and characterization of warm giant planets such as TOI-201 b is important for constraining formation and evolution theories for giant planets.

arXiv comment21 pages, 11 figures, accepted to AJ

References in corpus (50)

• emcee: The MCMC Hammer
• Gaia Data Release 2. Summary of the contents and survey properties
• The Gaia mission
• PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
• The Transiting Exoplanet Survey Satellite
• MultiNest: an efficient and robust Bayesian inference tool for cosmology and particle physics
• Intrinsic Colors, Temperatures, and Bolometric Corrections of Pre-Main Sequence Stars
• dynesty: A Dynamic Nested Sampling Package for Estimating Bayesian Posteriors and Evidences
• X-ray spectral modelling of the AGN obscuring region in the CDFS: Bayesian model selection and catalogue
• Las Cumbres Observatory Global Telescope Network
• batman: BAsic Transit Model cAlculatioN in Python
• Kepler Presearch Data Conditioning II - A Bayesian Approach to Systematic Error Correction
• Fast and scalable Gaussian process modeling with applications to astronomical time series
• Kepler Presearch Data Conditioning I - Architecture and Algorithms for Error Correction in Kepler Light Curves
• No planet for HD 166435
• Origins of Hot Jupiters
• Homogeneous studies of transiting extrasolar planets. IV. Thirty systems with space-based light curves
• The Transiting Exoplanet Survey Satellite: Simulations of planet detections and astrophysical false positives
• RadVel: The Radial Velocity Modeling Toolkit
• Juliet: a versatile modelling tool for transiting and non-transiting exoplanetary systems
• Structure and evolution of super-Earth to super-Jupiter exoplanets: I. heavy element enrichment in the interior
• Characterization of exoplanets from their formation I: Models of combined planet formation and evolution
• Kepler Data Validation I -- Architecture, Diagnostic Tests, and Data Products for Vetting Transiting Planet Candidates
• Precision Stellar Characterization of FGKM Stars using an Empirical Spectral Library
• A Revised Exoplanet Yield from the Transiting Exoplanet Survey Satellite (TESS)
• The Next Generation Transit Survey (NGTS)
• Characterization of exoplanets from their formation II: The planetary mass-radius relationship
• Kepler Data Validation II -- Transit Model Fitting and Multiple-Planet Search
• Revisited Mass-Radius relations for exoplanets below 120 Earth masses
• 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
• Long-term magnetic activity of a sample of M-dwarf stars from the HARPS program I. Comparison of activity indices
• Ten years of speckle interferometry at SOAR
• APASS Landolt-Sloan BVgri photometry of RAVE stars. I. Data, effective temperatures and reddenings
• Connecting Giant Planet Atmosphere and Interior Modeling: Constraints on Atmospheric Metal Enrichment
• Minerva-Australis I: Design, Commissioning, & First Photometric Results
• The Rossiter-McLaughlin effect in Exoplanet Research
• ZASPE: A Code to Measure Stellar Atmospheric Parameters and their Covariance from Spectra
• Evidence of Three Mechanisms Explaining the Radius Anomaly of Hot Jupiters
• The Equilibrium Temperature of Planets in Elliptical Orbits
• HD 1397b: a transiting warm giant planet orbiting a V = 7.8 mag sub-giant star discovered by TESS
• TOI-677 b: A Warm Jupiter (P=11.2d) on an eccentric orbit transiting a late F-type star
• Simultaneous TESS and NGTS Transit Observations of WASP-166b
• TOI-257b (HD 19916b): A Warm sub-Saturn Orbiting an Evolved F-type Star
• Theoretical vs. observational uncertainties: composition of giant exoplanets
• SOPHIE velocimetry of Kepler transit candidates XIV. A joint photometric, spectroscopic, and dynamical analysis of the Kepler-117 system
• Detection of Periodicity Based on Independence Tests - III. Phase Distance Correlation Periodogram
• USuRPER: Unit-Sphere Representation PERiodogram for full spectra
• The architecture and formation of the Kepler-30 planetary system

Cited by in corpus (28)

• ExoClock Project III: 450 new exoplanet ephemerides from ground and space observations
• Analysis of a JWST NIRSpec Lab Time Series: Characterizing Systematics, Recovering Exoplanet Transit Spectroscopy, and Constraining a Noise Floor
• RV-detected planets around M dwarfs: Challenges for core accretion models
• The young HD 73583 (TOI-560) planetary system: Two 10-M${}_{\oplus }$ mini-Neptunes transiting a 500-Myr-old, bright, and active K dwarf
• Warm Jupiters in TESS Full-Frame Images: A Catalog and Observed Eccentricity Distribution for Year 1
• TESS spots a mini-neptune interior to a hot saturn in the TOI-2000 system
• The PLATO field selection process. II. Characterization of LOPS2, the first long-pointing field
• TOI-5678 b: A 48-day transiting Neptune-mass planet characterized with CHEOPS and HARPS
• Revisiting K2-233 spectroscopic time-series with multidimensional Gaussian Processes
• Three long period transiting giant planets from TESS
• Three Warm Jupiters around Solar-analog stars detected with TESS
• Hundreds of TESS exoplanets might be larger than we thought
• TOI-837b is a Young Saturn-sized Exoplanet with a Massive 70 $M_{\oplus }$ Core
• The EBLM Project XII. An eccentric, long-period eclipsing binary with a companion near the hydrogen-burning limit
• A close-in puffy Neptune with hidden friends: The enigma of TOI 620
• New Periodograms Separating Orbital Radial Velocities and Spectral Shape Variation
• Characterization of seven transiting systems including four warm Jupiters from SOPHIE and TESS
• TOI-4504: Exceptionally large Transit Timing Variations induced by two resonant warm gas giants in a three planet system
• Three Saturn-mass planets transiting F-type stars revealed with TESS and HARPS
• Three Warm Jupiters orbiting TOI-6628, TOI-3837, TOI-5027 and one sub-Saturn orbiting TOI-2328
• Dynamical Architectures of S-type Transiting Planets in Binaries I: Target Selection using Hipparcos and Gaia proper motion anomalies
• A Transiting Giant on a 7.7-Year Orbit Revealed by TTVs in the TOI-201 System
• NGTS-EB-7, an eccentric, long-period, low-mass eclipsing binary
• Dynamical Architectures of S-type Transiting Planets in Binaries II: A Dichotomy in Orbital Alignment of Small Planets in Close Binary Systems
• Detection and characterisation of a 106-day transiting Jupiter : TOI-2449 b / NGTS-36 b
• Uncovering the Rapidly Evolving Orbits of the Dynamic TOI-201 System
• ASTEP confirmation of a pair of long-period Jupiter-sized planets with extremely low densities transiting TOI-791
• A distant brown dwarf coplanar to a warm Jupiter and a hot super-Earth