A giant exoplanet orbiting a very low-mass star challenges planet formation models

Abstract

Statistical analyses from exoplanet surveys around low-mass stars indicate that super-Earth and Neptune-mass planets are more frequent than gas giants around such stars, in agreement with core accretion theory of planet formation. Using precise radial velocities derived from visual and near-infrared spectra, we report the discovery of a giant planet with a minimum mass of 0.46 Jupiter masses in an eccentric 204-day orbit around the very low-mass star GJ 3512. Dynamical models show that the high eccentricity of the orbit is most likely explained from planet-planet interactions. The reported planetary system challenges current formation theories and puts stringent constraints on the accretion and migration rates of planet formation and evolution models, indicating that disc instability may be more efficient in forming planets than previously thought.

arXiv commentManuscript author version. 41 pages, 11 figures

References in corpus (58)

• emcee: The MCMC Hammer
• Gaia Data Release 2. Summary of the contents and survey properties
• Gaia Data Release 2: The astrometric solution
• New evolutionary models for pre-main sequence and main sequence low-mass stars down to the hydrogen-burning limit
• Protoplanetary Disks and Their Evolution
• Rapid growth of gas-giant cores by pebble accretion
• Interpreting Spectral Energy Distributions from Young Stellar Objects. II. Fitting observed SEDs using a large grid of pre-computed models
• Ages for illustrative field stars using gyrochronology: viability, limitations and errors
• The HARPS search for southern extra-solar planets XXXI. The M-dwarf sample
• The Occurrence and Mass Distribution of Close-in Super-Earths, Neptunes, and Jupiters
• One or more bound planets per Milky Way star from microlensing observations
• Gravitational Instabilities in Circumstellar Disks
• Stellar, brown dwarf and multiple star properties from a radiation hydrodynamical simulation of star cluster formation
• Spectrum radial velocity analyser (SERVAL). High-precision radial velocities and two alternative spectral indicators
• A Steeper than Linear Disk Mass-Stellar Mass Scaling Relation
• Core-Accretion Model Predicts Few Jovian-Mass Planets Orbiting Red Dwarfs
• The first WASP public data release
• Protoplanetary disk lifetimes vs stellar mass and possible implications for giant planet populations
• Initial Conditions of Planet Formation: Lifetimes of Primordial Disks
• The rotation and Galactic kinematics of mid M dwarfs in the Solar Neighborhood
• The Exoplanet Mass-Ratio Function from the MOA-II Survey: Discovery of a Break and Likely Peak at a Neptune Mass
• A Planetary Companion to the Nearby M4 Dwarf, Gliese 876
• How to form planetesimals from mm-sized chondrules and chondrule aggregates
• Clumps in the Outer Disk by Disk Instability: Why They are Initially Gas Giants and the Legacy of Disruption
• Planetesimal formation near the snowline: in or out?
• The CARMENES search for exoplanets around M dwarfs: High-resolution optical and near-infrared spectroscopy of 324 survey stars
• The effects of fly-bys on planetary systems
• Toward a Deterministic Model of Planetary Formation VII: Eccentricity Distribution of Gas Giants
• Variable protostellar accretion with episodic bursts
• Efficient fitting of multiplanet Keplerian models to radial velocity and astrometry data
• The CARMENES search for exoplanets around M dwarfs: Different roads to radii and masses of the target stars
• Global Models for the Evolution of Embedded, Accreting Protostellar Disks
• Transit Detection in the MEarth Survey of Nearby M Dwarfs: Bridging the Clean-First, Search-Later Divide
• Rapid Formation of Gas Giant Planets around M Dwarf Stars
• The radial dependence of pebble accretion rates: A source of diversity in planetary systems I. Analytical formulation
• Planetesimal formation by the streaming instability in a photoevaporating disk
• The Ages of the Thin Disk, Thick Disk, and the Halo from Nearby White Dwarfs
• Accounting for velocity jitter in planet search surveys
• Close encounters in young stellar clusters: implications for planetary systems in the solar neighbourhood
• How planetary growth outperforms migration
• The stability and fates of hierarchical two-planet systems
• Correcting HIRES radial velocities for small systematic errors
• The Mass Budget of Planet Forming Discs: Isolating the Epoch of Planetesimal Formation
• CARMENES input catalogue of M dwarfs II. High-resolution imaging with FastCam
• Constraining planet structure and composition from stellar chemistry: trends in different stellar populations
• Constraining Orbital Parameters Through Planetary Transit Monitoring
• Planetesimal Population Synthesis: Pebble Flux Regulated Planetesimal Formation
• OGLE-2012-BLG-0563Lb: a Saturn-mass Planet around an M Dwarf with the Mass Constrained by Subaru AO imaging
• Eccentricity evolution during planet-disc interaction
• The full spectral radiative properties of Proxima Centauri
• The AstraLux Multiplicity Survey: Extension to Late M-dwarfs
• Growth after the streaming instability: from planetesimal accretion to pebble accretion
• Dawes Review. The tidal downsizing hypothesis of planet formation
• A planetary system with gas giants and super-Earths around the nearby M dwarf GJ 676A. Optimizing data analysis techniques for the detection of multi-planetary systems
• Constraints on the formation mechanism of the planetary mass companion of 2MASS 1207334-393254
• Survival of habitable planets in unstable planetary systems
• A method to estimate stellar ages from kinematical data
• Formation of Giant Planets

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• Density, not radius, separates rocky and water-rich small planets orbiting M dwarf stars
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• Active Stars in the Spectroscopic Survey of Mid-to-Late M Dwarfs Within 15pc
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• Photometric Calibrations of M-dwarf Metallicity with Markov Chain Monte Carlo and Bayesian Inference
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• A likely magnetic activity cycle for the exoplanet host M dwarf GJ 3512
• A super-Earth on a close-in orbit around the M1V star GJ 740. A HADES and CARMENES collaboration
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• The link between infall location, early disc size, and the fraction of self-gravitationally fragmenting discs
• Giant planet swaps during close stellar encounters
• A transiting giant planet in orbit around a 0.2-solar-mass host star
• Grain Growth in the Dust Ring with Crescent around Very Low Mass Star ZZ Tau IRS with JVLA
• Minimum Orbital Periods of H-Rich Bodies
• DIPSY: A new Disc Instability Population SYnthesis, II. The Populations of Companions Formed Through Disc Instability
• High-resolution Pan-STARRS and SMA observations of IRAS 23077+6707: A giant edge-on protoplanetary disk
• The Effect of the Approach to Gas Disk Gravitational Instability on the Rapid Formation of Gas Giant Planets. II. Quadrupled Spatial Resolution
• The CARMENES search for exoplanets around M dwarfs. Occurrence rates of Earth-like planets around very low-mass stars
• Relative Occurrence Rate Between Hot and Cold Jupiters as an Indicator to Probe Planet Migration
• Searching for wide-orbit gravitational instability protoplanets with ALMA in the dust continuum
• GEMS JWST: Transmission spectroscopy of TOI-5205b reveals significant stellar contamination and a metal-poor atmosphere
• Interstellar Meteors from Tidal Disruption of Rocky Planets on Eccentric Orbits Around M Dwarfs
• On the survivability of a population of gas giant planets on wide orbits
• Giant planet formation via pebble accretion across different stellar masses
• Characterizing planetary systems with SPIRou: a temperate sub-Neptune exoplanet orbiting the nearby fully-convective star GJ 1289 and a candidate around GJ 3378
• Planetary system architectures with low-mass inner planets: Direct imaging exploration of mature systems beyond 1 au
• Planetesimal Growth in Evolving Protoplanetary Disks: Constraints from the Pebble Supply
• GTC/CanariCam deep mid-infrared imaging survey of northern stars within 5 pc
• The Outcome of Collisions between Gaseous Clumps formed by Disk Instability
• TOI-3288 b and TOI-4666 b: two gas giants transiting low-mass stars characterised by NIRPS
• DIPSY: A new Disc Instability Population SYnthesis, I. Modeling, evolution of individual systems, and tests
• The CARMENES search for exoplanets around M dwarfs : Understanding the wavelength dependence of radial velocity measurements
• Planetary Dynamos in Evolving Cold Gas Giants
• Warm Jupiters around M-dwarfs are great opportunities for extensive chemical, cloud and haze characterisation with JWST
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• A Panchromatic JWST Spectrum of a Giant Starspot on the Fully Convective M-dwarf TOI-3884
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• NuAncestor: an artificial satellite-borne star for accurate frequency calibration of ground-based EPRV spectrographs