TOI-5344 b: A Saturn-like planet orbiting a super-Solar metallicity M0 dwarf

Abstract

We confirm the planetary nature of TOI-5344 b as a transiting giant exoplanet around an M0 dwarf star. TOI-5344 b was discovered with the Transiting Exoplanet Survey Satellite photometry and confirmed with ground-based photometry (the Red Buttes Observatory 0.6m telescope), radial velocity (the Habitable-zone Planet Finder), and speckle imaging (the NN-Explore Exoplanet Stellar Speckle Imager). TOI-5344 b is a Saturn-like giant planet ($\rho =0.80_{-0.15}^{+0.17}{\text{g cm}}^{-3}$) with a planetary radius of $9.7\pm 0.5{\text{R}}_{\oplus }$ ($0.87\pm 0.04{\text{R}}_{\text{Jup}}$) and a planetary mass of $135_{-18}^{+17}{\text{M}}_{\oplus }$ ($0.42_{-0.06}^{+0.05}{\text{M}}_{\text{Jup}}$). It has an orbital period of $3.792622\pm 0.000010$ days and an orbital eccentricity of $0.06_{-0.04}^{+0.07}$. We measure a high metallicity for TOI-5344 of [Fe/H] = $0.48\pm 0.12$, where the high metallicity is consistent with expectations from formation through core accretion. We compare the metallicity of the M-dwarf hosts of giant exoplanets to that of M-dwarf hosts of non-giants ($\lesssim 8{\text{R}}_{\oplus }$). While the two populations appear to show different metallicity distributions, quantitative tests are prohibited by various sample caveats.

arXiv comment19 pages, 10 figures, 4 tables, AJ accepted. Added references

References in corpus (86)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Astropy: A Community Python Package for Astronomy
• 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
• The Gaia mission
• Gaia Data Release 3: Summary of the content and survey properties
• The Transiting Exoplanet Survey Satellite
• MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
• Analytic Lightcurves for Planetary Transit Searches
• Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3
• MESA Isochrones and Stellar Tracks (MIST) 0: Methods for the construction of stellar isochrones
• Local Kinematics and the Local Standard of Rest
• Estimating distances from parallaxes IV: Distances to 1.33 billion stars in Gaia Data Release 2
• The generalised Lomb-Scargle periodogram. A new formalism for the floating-mean and Keplerian periodograms
• galpy: A Python Library for Galactic Dynamics
• New evolutionary models for pre-main sequence and main sequence low-mass stars down to the hydrogen-burning limit
• A 3D Dust Map Based on Gaia, Pan-STARRS 1 and 2MASS
• The Zwicky Transient Facility: Data Processing, Products, and Archive
• The All-Sky Automated Survey for Supernovae (ASAS-SN) Light Curve Server v1.0
• Exploring the Milky Way stellar disk. A detailed elemental abundance study of 714 F and G dwarf stars in the Solar neighbourhood
• Fast and scalable Gaussian process modeling with applications to astronomical time series
• Planetary Radii across Five Orders of Magnitude in Mass and Stellar Insolation: Application to Transits
• Spectroscopic [Fe/H] for 98 extra-solar planet-host stars: Exploring the probability of planet formation
• Models of Stars, Brown Dwarfs and Exoplanets
• Efficient, uninformative sampling of limb darkening coefficients for two-parameter laws
• The NASA Exoplanet Archive: Data and Tools for Exoplanet Research
• astroquery: An Astronomical Web-Querying Package in Python
• The Mass Dependence Between Protoplanetary Disks and their Stellar Hosts
• 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
• BANYAN. XI. The BANYAN $\Sigma$ multivariate Bayesian algorithm to identify members of young associations within 150 pc
• Towards a deterministic model of planetary formation. III. Mass distribution of short-period planets around stars of various masses
• Spectrum radial velocity analyser (SERVAL). High-precision radial velocities and two alternative spectral indicators
• Core-Accretion Model Predicts Few Jovian-Mass Planets Orbiting Red Dwarfs
• The Mass-Metallicity Relation for Giant Planets
• The California-Kepler Survey. IV. Metal-rich Stars Host a Greater Diversity of Planets
• STARRY: Analytic Occultation Light Curves
• Parametrizing the exoplanet eccentricity distribution with the Beta distribution
• Exploring The Frequency Of Close-In Jovian Planets Around M Dwarfs
• eleanor: An open-source tool for extracting light curves from the TESS Full-Frame Images
• The Effective Temperature Scale of M dwarfs
• Formation of Jupiter using opacities based on detailed grain physics
• The New Generation Planetary Population Synthesis (NGPPS). IV. Planetary systems around low-mass stars
• Barycentric Corrections at 1 cm/s for precise Doppler velocities
• The Habitable-Zone Planet Finder: A Stabilized Fiber-Fed NIR Spectrograph for the Hobby-Eberly Telescope
• Characterizing the Cool KOIs II. The M Dwarf KOI-254 and its Hot Jupiter
• Fluxes in Hαand Ca II H and K for a sample of Southern stars
• CARMENES input catalogue of M dwarfs V. Luminosities, colours, and spectral energy distributions
• Analytic Planetary Transit Light Curves and Derivatives for Stars with Polynomial Limb Darkening
• The CARMENES search for exoplanets around M dwarfs -- Planet occurrence rates from a subsample of 71 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
• Python Leap Second Management and Implementation of Precise Barycentric Correction (barycorrpy)
• Gas Giant Protoplanets Formed by Disk Instability in Binary Star Systems
• The fuzziness of giant planets' cores
• NGTS-1b: A hot Jupiter transiting an M-dwarf
• Observational evidence for two distinct giant planet populations
• Occurrence rate of hot Jupiters around early-type M dwarfs based on TESS data
• The occurrence rate of giant planets orbiting low-mass stars with TESS
• Standard Galactic Field RR Lyrae. I. Optical to Mid-infrared Phased Photometry
• TESS-Gaia Light Curve: a PSF-based TESS FFI light curve product
• A sub-Neptune sized planet transiting the M2.5-dwarf G 9-40: Validation with the Habitable-zone Planet Finder
• Properties and occurrence rates of $Kepler$ exoplanet candidates as a function of host star metallicity from the DR25 catalog
• Models of Saturn's Interior Constructed with Accelerated Concentric Maclaurin Spheroid Method
• Jupiter's interior from Juno: Equation-of-state uncertainties and dilute core extent
• The TESS Faint Star Search: 1,617 TOIs from the TESS Primary Mission
• The Ca II infrared triplet's performance as an activity indicator compared to Ca II H and K
• Tests of In-Situ Formation Scenarios for Compact Multiplanet Systems
• HADES RV Programme with HARPS-N at TNG XV. Planetary occurrence rates around early-M dwarfs
• Overview of the spectrometer optical fiber feed for the Habitable-zone Planet Finder
• TOI-5205 b: A Short-period Jovian Planet Transiting a Mid-M Dwarf
• Investigating the Planet-Metallicity Correlation for Hot Jupiters
• Proxima Centauri as a Benchmark for Stellar Activity Indicators in the Near Infrared
• On the mass of gas giant planets: Is Saturn a failed gas giant?
• HATS-74Ab, HATS-75b, HATS-76b and HATS-77b: Four Transiting Giant Planets around K and M Dwarfs
• TOI-3714 b and TOI-3629 b: Two gas giants transiting M dwarfs confirmed with HPF and NEID
• TOI-530b: A giant planet transiting an M dwarf detected by TESS
• TOI-3235 b: a transiting giant planet around an M4 dwarf star
• The AMBRE Project: Origin and evolution of sulfur in the Milky Way
• An M dwarf accompanied by a close-in giant orbiter with SPECULOOS
• The mass determination of TOI-519 b: a close-in giant planet transiting a metal-rich mid-M dwarf
• TOI-3984 A b and TOI-5293 A b: two temperate gas giants transiting mid-M dwarfs in wide binary systems
• Remote Operations and Nightly Automation of The Red Buttes Observatory
• A massive hot Jupiter orbiting a metal-rich early-M star discovered in the TESS full frame images
• A sensitivity analysis of the WFCAM Transit Survey for short-period giant planets around M dwarfs
• The unusual M-dwarf Warm Jupiter TOI-1899~b: Refinement of orbital and planetary parameters

Cited by in corpus (7)

• Metallicity Dependence of Giant Planets around M Dwarfs
• Hundreds of TESS exoplanets might be larger than we thought
• Validation of up to seven TESS planet candidates through multi-colour transit photometry using MuSCAT2 data
• TOI-5108 b and TOI 5786 b: Two transiting sub-Saturns detected and characterized with TESS, MaHPS and SOPHIE
• Exploring Synergies between Twinkle and Ariel: a Pilot Study
• Searching for GEMS: Three warm Saturns and a super-Jupiter orbiting four early M-dwarfs
• Searching for GEMS: TOI-5916 b & TOI-6158 b are two Saturn-density planets orbiting M2 dwarfs