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Anders Johansen. Profile picture.

Anders Johansen

Professor

Anders Johansen. Profile picture.

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

Author

  • J. C. Morales
  • A. J. Mustill
  • I. Ribas
  • M. B. Davies
  • A. Reiners
  • F. F. Bauer
  • D. Kossakowski
  • E. Herrero
  • E. Rodriguez
  • M. J. López-González
  • C. Rodriguez-López
  • V. J. S. Béjar
  • L. González-Cuesta
  • R. Luque
  • E. Pallé
  • M. Perger
  • D. Baroch
  • A. Johansen
  • H. Klahr
  • C. Mordasini
  • G. Anglada-Escudé
  • J. A. Caballero
  • M. Cortés-Contreras
  • S. Dreizler
  • M. Lafarga
  • E. Nagel
  • V. M. Passegger
  • S. Reffert
  • A. Rosich
  • A. Schweitzer
  • L. Tal-Or
  • T. Trifonov
  • M. Zechmeister
  • A. Quirrenbach
  • P. J. Amado
  • E. W. Guenther
  • H.-J. Hagen
  • T. Henning
  • S. V. Jeffers
  • A. Kaminski
  • M. Kürster
  • D. Montes
  • W. Seifert
  • F. J. Abellán
  • M. Abril
  • J. Aceituno
  • F. J. Aceituno
  • F. J. Alonso-Floriano
  • M. Ammler-von Eiff
  • R. Antona
  • B. Arroyo-Torres
  • M. Azzaro
  • D. Barrado
  • S. Becerril-Jarque
  • D. Benitez
  • Z. M. Berdiñas
  • G. Bergond
  • M. Brinkmöller
  • C. del Burgo
  • R. Burn
  • R. Calvo-Ortega
  • J. Cano
  • M. C. Cárdenas
  • C. Cardona Guillén
  • J. Carro
  • E. Casal
  • V. Casanova
  • N. Casasayas-Barris
  • P. Chaturvedi
  • C. Cifuentes
  • A. Claret
  • J. Colomé
  • S. Czesla
  • E. Diez-Alonso
  • R. Dorda
  • A. Emsenhuber
  • M. Fernández
  • A. Fernández-Martin
  • I. M. Ferro
  • B. Fuhrmeister
  • D. Galadi-Enriquez
  • I. Gallardo Cava
  • M. L. Garcia Vargas
  • A. Garcia-Piquer
  • L. Gesa
  • E. González-Álvarez
  • J. I. González Hernández
  • R. González-Peinado
  • J. Guàrdia
  • A. Guijarro
  • E. de Guindos
  • A. P. Hatzes
  • P. H. Hauschildt
  • R. P. Hedrosa
  • I. Hermelo
  • R. Hernández Arabi
  • F. Hernández Otero
  • D. Hintz
  • G. Holgado
  • A. Huber
  • P. Huke
  • E. N. Johnson
  • E. de Juan
  • M. Kehr
  • J. Kemmer
  • M. Kim
  • J. Klüter
  • A. Klutsch
  • F. Labarga
  • N. Labiche
  • S. Lalitha
  • M. Lampón
  • L. M. Lara
  • R. Launhardt
  • F. J. Lázaro
  • J.-L. Lizon
  • M. Llamas
  • N. Lodieu
  • M. López del Fresno
  • J. F. López Salas
  • J. López-Santiago
  • H. Magán Madinabeitia
  • U. Mall
  • L. Mancini
  • H. Mandel
  • E. Marfil
  • J. A. Marin Molina
  • E. L. Martin
  • P. Martin-Fernández
  • S. Martin-Ruiz
  • H. Martinez-Rodriguez
  • C. J. Marvin
  • E. Mirabet
  • A. Moya
  • V. Naranjo
  • R. P. Nelson
  • L. Nortmann
  • G. Nowak
  • A. Ofir
  • J. Pascual
  • A. Pavlov
  • S. Pedraz
  • D. Pérez Medialdea
  • A. Pérez-Calpena
  • M. A. C. Perryman
  • O. Rabaza
  • A. Ramón Ballesta
  • R. Rebolo
  • P. Redondo
  • H.-W. Rix
  • F. Rodler
  • A. Rodriguez Trinidad
  • S. Sabotta
  • S. Sadegi
  • M. Salz
  • E. Sánchez-Blanco
  • M. A. Sánchez Carrasco
  • A. Sánchez-López
  • J. Sanz-Forcada
  • P. Sarkis
  • L. F. Sarmiento
  • S. Schäfer
  • M. Schlecker
  • J. H. M. M. Schmitt
  • P. Schöfer
  • E. Solano
  • A. Sota
  • O. Stahl
  • S. Stock
  • T. Stuber
  • J. Stürmer
  • J. C. Suárez
  • H. M. Tabernero
  • S. M. Tulloch
  • G. Veredas
  • J. I. Vico-Linares
  • F. Vilardell
  • K. Wagner
  • J. Winkler
  • V. Wolthoff
  • F. Yan
  • M. R. Zapatero Osorio

Summary, in English

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.

Department/s

  • Lund Observatory
  • eSSENCE: The e-Science Collaboration
  • Department of Astronomy and Theoretical Physics

Publishing year

2019-09-27

Language

English

Pages

1441-1445

Publication/Series

Science

Volume

365

Issue

6460

Document type

Journal article

Publisher

American Association for the Advancement of Science (AAAS)

Topic

  • Astronomy, Astrophysics and Cosmology

Status

Published

Project

  • IMPACT: Comets, asteroids and the habitability of planets

ISBN/ISSN/Other

  • ISSN: 0036-8075