TOI-530b: A giant planet transiting an M dwarf detected by TESS

Abstract

We report the discovery of TOI-530b, a transiting giant planet around an M0.5V dwarf, delivered by the Transiting Exoplanet Survey Satellite (TESS). The host star is located at a distance of $147.7\pm 0.6$ pc with a radius of $R_{\ast }=0.54\pm 0.03R_{\odot }$ and a mass of $M_{\ast }=0.53\pm 0.02M_{\odot }$. We verify the planetary nature of the transit signals by combining ground-based multi-wavelength photometry, high resolution spectroscopy from SPIRou as well as high-angular-resolution imaging. With $V=15.4$ mag, TOI-530b is orbiting one of the faintest stars accessible by ground-based spectroscopy. Our model reveals that TOI-530b has a radius of $0.83\pm 0.05R_J$ and a mass of $0.4\pm 0.1M_J$ on a 6.39-d orbit. TOI-530b is the sixth transiting giant planet hosted by an M-type star, which is predicted to be infrequent according to core accretion theory, making it a valuable object to further study the formation and migration history of similar planets. We discuss the potential formation channel of such systems.

17 pages, 12 figures, 8 tables, accepted for publication by MNRAS

References in corpus (43)

• The Transiting Exoplanet Survey Satellite
• The generalised Lomb-Scargle periodogram. A new formalism for the floating-mean and Keplerian periodograms
• The K2 Mission: Characterization and Early results
• galpy: A Python Library for Galactic Dynamics
• Bayes in the sky: Bayesian inference and model selection in cosmology
• The Zwicky Transient Facility: Data Processing, Products, and Archive
• How to Constrain Your M Dwarf: measuring effective temperature, bolometric luminosity, mass, and radius
• The Solar Neighborhood XVII: Parallax Results from the CTIOPI 0.9m Program -- Twenty New Members of the RECONS 10 Parsec Sample
• Planet formation around stars of various masses: The snow line and the frequency of giant planets
• Spectrum radial velocity analyser (SERVAL). High-precision radial velocities and two alternative spectral indicators
• Accurate, Empirical Radii and Masses of Planets and their Host Stars with Gaia Parallaxes
• The TESS Objects of Interest Catalog from the TESS Prime Mission
• Parallax Systematics and Photocenter Motions of Benchmark Eclipsing Binaries in Gaia EDR3
• The Kepler Follow-Up Observation Program. I. A Catalog of Companions to Kepler Stars from High-Resolution Imaging
• Transit Least Squares: Optimized transit detection algorithm to search for periodic transits of small planets
• Eclipsing Binary Stars as Benchmarks for Trigonometric Parallaxes in the Gaia Era
• Empirical, Accurate Masses and Radii of Single Stars with TESS and Gaia
• SPIRou: nIR velocimetry & spectropolarimetry at the CFHT
• Rapid Formation of Gas Giant Planets around M Dwarf Stars
• HATS-6b: A Warm Saturn Transiting an Early M Dwarf Star, and a Set of Empirical Relations for Characterizing K and M Dwarf Planet Hosts
• SPIRou: the near-infrared spectropolarimeter/high-precision velocimeter for the Canada-France-Hawaii telescope
• A giant exoplanet orbiting a very low-mass star challenges planet formation models
• A Long-Period Jupiter-Mass Planet Orbiting the Nearby M Dwarf GJ849
• The First Habitable Zone Earth-sized Planet from TESS. I: Validation of the TOI-700 System
• Investigating the young AU~Mic system with SPIRou: large-scale stellar magnetic field and close-in planet mass
• Speckle Observations of TESS Exoplanet Host Stars. II. Stellar Companions at 1-1000 AU and Implications for Small Planet Detection
• A Jupiter-like Planet Orbiting the Nearby M Dwarf GJ832
• HADES RV Programme with HARPS-N at TNG XII. The abundance signature of M dwarf stars with planets
• SPIRou Input Catalog: Activity, Rotation and Magnetic Field of Cool Dwarfs
• A Tale of Planet Formation: From Dust to Planets
• Speckle Imaging Excludes Low-Mass Companions Orbiting the Exoplanet Host Star TRAPPIST-1
• MuSCAT2 multicolour validation of TESS candidates: an ultra-short-period substellar object around an M dwarf
• Speckle Observations of TESS Exoplanet Host Stars: Understanding the Binary Exoplanet Host Star Orbital Period Distribution
• Telluric-line subtraction in high-accuracy velocimetry: a PCA-based approach
• The First Habitable Zone Earth-Sized Planet From TESS II: $Spitzer$ Confirms TOI-700 d
• TOI-1278 B: SPIRou unveils a rare Brown Dwarf Companion in Close-In Orbit around an M dwarf
• A warm Jupiter transiting an M dwarf: A TESS single transit event confirmed with the Habitable-zone Planet Finder
• Optical Transmission Spectroscopy of the Terrestrial Exoplanet LHS 3844b from 13 Ground-Based Transit Observations
• LHS 1815b: The First Thick-Disk Planet Detected By TESS
• Modeling the Echelle Spectra Continuum with Alpha Shapes and Local Regression Fitting
• TOI-519 b: a short-period substellar object around an M dwarf validated using multicolour photometry and phase curve analysis
• Early science with SPIRou: near-infrared radial velocity and spectropolarimetry of the planet-hosting star HD 189733
• An Earth-mass Planet in a Time of Covid-19: KMT-2020-BLG-0414Lb

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• Occurrence rate of hot Jupiters around early-type M dwarfs based on TESS data
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• TOI-5205 b: A Short-period Jovian Planet Transiting a Mid-M Dwarf
• Mid-to-Late M Dwarfs Lack Jupiter Analogs
• Searching for Giant Exoplanets around M-dwarf Stars (GEMS) I: Survey Motivation
• TOI-3235 b: a transiting giant planet around an M4 dwarf star
• The mass determination of TOI-519 b: a close-in giant planet transiting a metal-rich mid-M dwarf
• TESS discovery of a sub-Neptune orbiting a mid-M dwarf TOI-2136
• A massive hot Jupiter orbiting a metal-rich early-M star discovered in the TESS full frame images
• Metallicity Dependence of Giant Planets around M Dwarfs
• TOI-5344 b: A Saturn-like planet orbiting a super-Solar metallicity M0 dwarf
• Hundreds of TESS exoplanets might be larger than we thought
• The unusual M-dwarf Warm Jupiter TOI-1899~b: Refinement of orbital and planetary parameters
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• Tidally Heated Sub-Neptunes, Refined Planetary Compositions, and Confirmation of a Third Planet in the TOI-1266 System
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