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

J C MoralesA J MustillIgnasi RibasM B DaviesA ReinersFlorian F BauerD KossakowskiE HerreroEloy RodríguezMaría José López-GonzálezCristina Rodríguez-LópezV J S BéjarL González-CuestaRafael LuqueE PalléM PergerD BarochA JohansenH KlahrChristoph MordasiniGuillem Anglada-EscudéJ A CaballeroM Cortés-ContrerasS DreizlerM LafargaEvangelos NagelV M PasseggerSabine ReffertA RosichA SchweitzerL Tal-OrT TrifonovMathias ZechmeisterA QuirrenbachPedro J AmadoEike GuentherH-J HagenT HenningS V JeffersA KaminskiM KürsterDavid MontesW SeifertF J AbellánM AbrilJ AceitunoF J AceitunoF Javier Alonso-FlorianoM Ammler-von EiffR AntonaB Arroyo-TorresM AzzaroDavid BarradoS Becerril-JarqueD BenítezZ M BerdiñasG BergondM BrinkmöllerC Del BurgoRemo BurnR Calvo-OrtegaJ CanoM C CárdenasC Cardona GuillénJ CarroE CasalV CasanovaN Casasayas-BarrisPriyanka ChaturvediC CifuentesA ClaretJ ColoméS CzeslaEnrique DiezR DordaAlexandre EmsenhuberM FernándezA Fernández-MartínI M FerroB FuhrmeisterD Galadí-EnríquezI Gallardo CavaM L García VargasA Garcia-PiquerL GesaE González-ÁlvarezJ I González HernándezR González-PeinadoJ GuàrdiaA GuijarroE de GuindosA P HatzesP H HauschildtR P HedrosaI HermeloR Hernández ArabiF Hernández OteroD HintzG HolgadoA HuberP HukeE N JohnsonE de JuanM KehrJ KemmerM KimJ KlüterA KlutschF LabargaN LabicheS LalithaManuel LampónLuisa M LaraR LaunhardtF J LázaroJ-L LizonM LlamasN LodieuM López Del FresnoJ F López SalasJ López-SantiagoH Magán MadinabeitiaU MallLuigi ManciniH MandelE MarfilJ A Marín MolinaE L MartínP Martín-FernándezS Martín-RuizH Martínez-RodríguezC J MarvinE MirabetA MoyaV NaranjoR P NelsonLisa NortmannGrzegorz NowakA OfirJ Pascual-GranadoA PavlovS PedrazD Pérez MedialdeaA Pérez-CalpenaM A C PerrymanOvidio RabazaA Ramón BallestaR ReboloP RedondoH-W RixF RodlerA Rodríguez TrinidadS SabottaS SadegiM SalzE Sánchez-BlancoM A Sánchez CarrascoAlejandro Sánchez-LópezJorge Sanz-ForcadaP SarkisL F SarmientoS SchäferM SchleckerJürgen H M M SchmittP SchöferE SolanoA SotaO StahlS StockT StuberJ StürmerJ C SuárezH M TaberneroS M TullochG VeredasJ I Vico-LinaresF VilardellK WagnerJ WinklerV WolthoffFei YanM R Zapatero Osorio
Published in: Science (New York, N.Y.) (2020)
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 that the GJ 3512 planetary system challenges generally accepted formation theories, and that it puts constraints on the planet accretion and migration rates. Disk instabilities may be more efficient in forming planets than previously thought.
Keyphrases
  • small molecule
  • high resolution
  • magnetic resonance imaging
  • high throughput
  • ultrasound guided
  • rare case
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  • fine needle aspiration