Gl 725A b: a potential super-Earth detected with SOPHIE and SPIRou in an M dwarf binary system at 3.5 pc

Abstract

We report the discovery of a super-Earth candidate orbiting the nearby mid M dwarf Gl\,725A using the radial velocity (RV) method. The planetary signal has been independently identified using high-precision RVs from the SOPHIE and SPIRou spectrographs, in the optical and near-infrared domains, respectively. We modelled the stellar activity signal jointly with the planet using two Gaussian Processes, one for each instrument to account for the chromaticity of the stellar activity and instrumental systematics, along with a Keplerian model. The signal is significantly detected with a RV semi-amplitude of $1.67\pm 0.20$ m/s. The planet Gl 725A b is found to be in an orbit compatible with circular with a period of $11.2201\pm 0.0051$ days. We analysed 27 sectors of TESS photometry on which no transit event was found. We determined a minimum mass of $M_p\sin i=2.78\pm 0.35M_{\oplus }$ which places the planet in the super-Earth regime. Using Mass-Radius relationships we predict a planetary radius to be between 1.2 and $2.0R_{\oplus }$. The proximity of Gl 725A, of only 3.5 pc, makes this new exoplanet one of the closest to Earth and joins the group of S-type low-mass planets in short orbits ($P<15$ d) around close M dwarfs.

arXiv comment26 pages, 17 figures. Accepted in A&A

References in corpus (106)

• emcee: The MCMC Hammer
• The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
• PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
• The Transiting Exoplanet Survey Satellite
• A terrestrial planet candidate in a temperate orbit around Proxima Centauri
• batman: BAsic Transit Model cAlculatioN in Python
• A box-fitting algorithm in the search for periodic transits
• Elemental Abundance Survey of The Galactic Thick Disk
• Long-Term Stability of Planets in Binary Systems
• Ages for illustrative field stars using gyrochronology: viability, limitations and errors
• No planet for HD 166435
• How to Constrain Your M Dwarf: measuring effective temperature, bolometric luminosity, mass, and radius
• The HARPS search for southern extra-solar planets XXXI. The M-dwarf sample
• The Occurrence Rate of Small Planets around Small Stars
• Probabilistic Forecasting of the Masses and Radii of Other Worlds
• Chemical abundances of 1111 FGK stars from the HARPS GTO planet search program.Galactic stellar populations and planets
• The Geneva-Copenhagen Survey of the Solar neighbourhood III. Improved distances, ages, and kinematics
• RadVel: The Radial Velocity Modeling Toolkit
• Planets and Stellar Activity: Hide and Seek in the CoRoT-7 system
• The Solar Neighborhood XVII: Parallax Results from the CTIOPI 0.9m Program -- Twenty New Members of the RECONS 10 Parsec Sample
• Basic physical parameters of a selected sample of evolved stars
• Spectrum radial velocity analyser (SERVAL). High-precision radial velocities and two alternative spectral indicators
• Design Considerations for a Ground-based Transit Search for Habitable Planets Orbiting M dwarfs
• Stellar and substellar companions of nearby stars from Gaia DR2 - Binarity from proper motion anomaly
• Assessing statistical significance of periodogram peaks
• How to Constrain Your M dwarf II: the mass-luminosity-metallicity relation from 0.075 to 0.70$M_{\odot }$
• S4N: A Spectroscopic Survey of Stars in the Solar Neighborhood
• A simple method to estimate radial velocity variations due to stellar activity using photometry
• Density, not radius, separates rocky and water-rich small planets orbiting M dwarf stars
• The NASA-UC-UH Eta-Earth Program: IV. A Low-mass Planet Orbiting an M Dwarf 3.6 PC from Earth
• The rotation and Galactic kinematics of mid M dwarfs in the Solar Neighborhood
• A revised estimate of the occurrence rate of terrestrial planets in the habitable zones around kepler m-dwarfs
• The HARPS search for southern extra-solar planets. X. A m sin i = 11 Mearth planet around the nearby spotted M dwarf GJ 674
• Planetary nebulae seen with TESS: Discovery of new binary central star candidates from Cycle 1
• Revisited Mass-Radius relations for exoplanets below 120 Earth masses
• TW Hydrae: evidence of stellar spots instead of a Hot Jupiter
• Radial mixing and the transition between the thick and thin Galactic discs
• Wotan: Comprehensive time-series de-trending in Python
• Inferring probabilistic stellar rotation periods using Gaussian processes
• Stellar activity of planetary host star HD 189733
• Detecting Planets Around Very Low Mass Stars with the Radial Velocity Method
• Search for exoplanets with the radial-velocity technique: quantitative diagnostics of stellar activity
• Observations of Cool-Star Magnetic Fields
• Measuring precise radial velocities on individual spectral lines. I. Validation of the method and application to mitigate stellar activity
• Bayesian distances and extinctions for giants observed by Kepler and APOGEE
• SPIRou: nIR velocimetry & spectropolarimetry at the CFHT
• TAPAS, a web-based service of atmospheric transmission computation for astronomy
• The CRIRES Search for Planets Around the Lowest-Mass Stars. I. High-Precision Near-Infrared Radial Velocities with an Ammonia Gas Cell
• The CARMENES search for exoplanets around M dwarfs -- Planet occurrence rates from a subsample of 71 stars
• orbitize!: A Comprehensive Orbit-fitting Software Package for the High-contrast Imaging Community
• The HARPS search for southern extra-solar planets XLI. A dozen planets around the M dwarfs GJ 3138, GJ 3323, GJ 273, GJ 628, and GJ 3293
• Star-Disc-Binary Interactions in Protoplanetary Disc Systems and Primordial Spin-Orbit Misalignments
• Three years of Sun-as-a-star radial-velocity observations on the approach to solar minimum
• The Ages of the Thin Disk, Thick Disk, and the Halo from Nearby White Dwarfs
• TRAPPIST: a robotic telescope dedicated to the study of planetary systems
• The GAPS programme with HARPS-N at TNG. I: Observations of the Rossiter-McLaughlin effect and characterisation of the transiting system Qatar-1
• The 10 parsec sample in the Gaia era
• A candidate short-period sub-Earth orbiting Proxima Centauri
• Revisiting Proxima with ESPRESSO
• Line-by-line velocity measurements, an outlier-resistant method for precision velocimetry
• SWEET-Cat 2.0: The Cat just got SWEETer; Higher quality spectra and precise parallaxes from GAIA eDR3
• Stacked Bayesian general Lomb-Scargle periodogram: Identifying stellar activity signals
• Three Red Suns in the Sky: A Transiting, Terrestrial Planet in a Triple M Dwarf System at 6.9 Parsecs
• Weighted principal component analysis: a weighted covariance eigendecomposition approach
• APERO: A PipelinE to Reduce Observations -- Demonstration with SPIRou
• Radial velocity signatures of Zeeman broadening
• Radial Velocity Data Analysis with Compressed Sensing Techniques
• The SOPHIE search for northern extrasolar planets VIII. A warm Neptune orbiting HD164595
• SPIRou Input Catalogue: Global properties of 440 M dwarfs observed with ESPaDOnS at CFHT
• Stellar activity as noise in exoplanet detection II. Application to M dwarfs
• A multiwavelength radial velocity search for planets around the brown dwarf LP 944-20
• Diving Beneath the Sea of Stellar Activity: Chromatic Radial Velocities of the Young AU Mic Planetary System
• Starspot-induced optical and infrared radial velocity variability in T Tauri star Hubble 4
• The GAPS Programme at TNG XXI -- A GIARPS case-study of known young planetary candidates: confirmation of HD 285507 b and refutation of AD Leo b
• A discontinuity in the $T_{\mathrm{eff}}$-radius relation of M-dwarfs
• Planet Formation in Disks with Inclined Binary Companions: Can Primordial Spin-Orbit Misalignment be Produced?
• A pair of Sub-Neptunes transiting the bright K-dwarf TOI-1064 characterised with CHEOPS
• Orbital Stability of Circumstellar Planets in Binary Systems
• TOI-1452 b: SPIRou and TESS reveal a super-Earth in a temperate orbit transiting an M4 dwarf
• HADES RV Programme with HARPS-N at TNG XV. Planetary occurrence rates around early-M dwarfs
• A Second Planet Transiting LTT 1445A and a Determination of the Masses of Both Worlds
• ODUSSEAS: A machine learning tool to derive effective temperature and metallicity for M dwarf stars
• Quasi-periodic Gaussian Processes for stellar activity: from physical to kernel parameters
• The SOPHIE search for northern extrasolar planets. XIV. A temperate ($T_{\mathrm{eq}}\sim 300$ K) super-earth around the nearby star Gliese 411
• The CARMENES search for exoplanets around M dwarfs. Mapping stellar activity indicators across the M dwarf domain
• Persistent starspot signals on M dwarfs: multi-wavelength Doppler observations with the Habitable-zone Planet Finder and Keck/HIRES
• Galactic Kinematics and Observed Flare Rates of a Volume-Complete Sample of Mid-to-Late M-dwarfs: Constraints on the History of the Stellar Radiation Environment of Planets Orbiting Low-mass Stars
• Stellar Companions to TESS Objects of Interest: A Test of Planet-Companion Alignment
• A Possible Alignment Between the Orbits of Planetary Systems and their Visual Binary Companions
• YARARA V2: Reaching sub m/s precision over a decade using PCA on line-by-line RVs
• The HADES RV Programme with HARPS-N@TNG VIII. Gl15A: A multiple wide planetary system sculpted by binary interaction
• Improving exoplanet detection capabilities with the false inclusion probability. Comparison with other detection criteria in the context of radial velocities
• The SPIRou Legacy Survey Rotation period of quiet M dwarfs from circular polarization in near-infrared spectral lines: I. The SPIRou APERO analysis
• Estimating the atmospheric properties of 44 M dwarfs from SPIRou spectra
• The TIME Table: Rotation and Ages of Cool Exoplanet Host Stars
• The SPIRou wavelength calibration for precise radial velocities in the near infrared
• The SOPHIE search for northern extrasolar planets XIII. Two planets around M-dwarfs Gl617A and Gl96
• A vigorous activity cycle mimicking a planetary system in HD200466
• Estimating fundamental parameters of nearby M dwarfs from SPIRou spectra
• The SOPHIE search for northern extrasolar planets XV. A Warm Neptune around the M-dwarf Gl378
• A Gaussian Process Regression Reveals No Evidence for Planets Orbiting Kapteyn's Star
• Gaussian processes for radial velocity modeling Better rotation periods and planetary parameters with the quasi-periodic kernel and constrained priors
• Optical and near-infrared stellar activity characterization of the early M dwarf Gl~205 with SOPHIE and SPIRou
• $\text{Wapiti}$: a data-driven approach to correct for systematics in RV data -- Application to SPIRou data of the planet-hosting M dwarf GJ 251
• The SOPHIE search for northern extrasolar planets-XIX. A system including a cold sub-Neptune potentially transiting a V = 6.5 star HD88986
• Estimating $T_{\mathrm{eff}}$, radius and luminosity of M-dwarfs using high resolution optical and NIR spectral features

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• The SPIRou Legacy Survey: Detection of a nearby world orbiting in the habitable zone of Gl725B achieved by correcting strong telluric contamination in near-infrared radial velocities with WAPITI