![The gas giant planet around GJ 3512. Artist’s impression of the star GJ 3512, a red dwarf of approximately one tenth of the mass of the Sun, on which the newly discovered exoplanet GJ 3512b, a gas giant of high mass, orbits an unusual planet in this type of planetary systems.](/sites/default/files/styles/crop_square_2_2_to_320px/public/images/news/ArtisticImpression_GJ3215.jpg?h=06e83ef6&itok=rKXEzEbL)
Surveys have shown that super-Earth and Neptune-mass exoplanets are more frequent than gas giants around low-mass stars, as predicted by the core accretion theory of planet formation. We report the discovery of a giant planet around the very-low-mass star GJ 3512, as determined by optical and near-infrared radial-velocity observations. The planet has a minimum mass of 0.46 Jupiter masses, very high for such a small host star, and an eccentric 204-day orbit. Dynamical models show that the high eccentricity is most likely due to planet-planet interactions. We use simulations to demonstrate
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