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

Giant planet Star (game theory)
DOI: 10.1126/science.aax3198 Publication Date: 2019-09-26T23:14:15Z
AUTHORS (182)
ABSTRACT
Statistical analyses from exoplanet surveys around low-mass stars indicate that super-Earth and Neptune-mass planets are more frequent than gas giants such stars, in agreement with core accretion theory of planet formation. Using precise radial velocities derived visual near-infrared spectra, we report the discovery a giant minimum mass 0.46 Jupiter masses an eccentric 204-day orbit very star GJ 3512. Dynamical models show high eccentricity is most likely explained planet-planet interactions. The reported planetary system challenges current formation theories puts stringent constraints on migration rates evolution models, indicating disc instability may be efficient forming previously thought.
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