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

Morales, J. C. ; Mustill, A. J. LU ; Ribas, I. ; Davies, M. B. LU ; Reiners, A. ; Bauer, F. F. ; Kossakowski, D. ; Herrero, E. ; Rodriguez, E. and López-González, M. J. , et al. (2019) In Science 365(6460). p.1441-1445
Abstract
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... (More)
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. (Less)
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Science
volume
365
issue
6460
pages
5 pages
publisher
American Association for the Advancement of Science
external identifiers
  • scopus:85072701169
  • pmid:31604272
ISSN
0036-8075
DOI
10.1126/science.aax3198
language
English
LU publication?
yes
id
1629e13a-daf9-453b-bd99-2b8b18cbff36
alternative location
https://arxiv.org/abs/1909.12174
date added to LUP
2019-10-07 13:33:25
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2020-02-19 05:40:32
@article{1629e13a-daf9-453b-bd99-2b8b18cbff36,
  abstract     = {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.},
  author       = {Morales, J. C. and Mustill, A. J. and Ribas, I. and Davies, M. B. and Reiners, A. and Bauer, F. F. and Kossakowski, D. and Herrero, E. and Rodriguez, E. and López-González, M. J. and Rodriguez-López, C. and Béjar, V. J. S. and González-Cuesta, L. and Luque, R. and Pallé, E. and Perger, M. and Baroch, D. and Johansen, A. and Klahr, H. and Mordasini, C. and Anglada-Escudé, G. and Caballero, J. A. and Cortés-Contreras, M. and Dreizler, S. and Lafarga, M. and Nagel, E. and Passegger, V. M. and Reffert, S. and Rosich, A. and Schweitzer, A. and Tal-Or, L. and Trifonov, T. and Zechmeister, M. and Quirrenbach, A. and Amado, P. J. and Guenther, E. W. and Hagen, H.-J. and Henning, T. and Jeffers, S. V. and Kaminski, A. and Kürster, M. and Montes, D. and Seifert, W. and Abellán, F. J. and Abril, M. and Aceituno, J. and Aceituno, F. J. and Alonso-Floriano, F. J. and Ammler-von Eiff, M. and Antona, R. and Arroyo-Torres, B. and Azzaro, M. and Barrado, D. and Becerril-Jarque, S. and Benitez, D. and Berdiñas, Z. M. and Bergond, G. and Brinkmöller, M. and del Burgo, C. and Burn, R. and Calvo-Ortega, R. and Cano, J. and Cárdenas, M. C. and Guillén, C. Cardona and Carro, J. and Casal, E. and Casanova, V. and Casasayas-Barris, N. and Chaturvedi, P. and Cifuentes, C. and Claret, A. and Colomé, J. and Czesla, S. and Diez-Alonso, E. and Dorda, R. and Emsenhuber, A. and Fernández, M. and Fernández-Martin, A. and Ferro, I. M. and Fuhrmeister, B. and Galadi-Enriquez, D. and Cava, I. Gallardo and Vargas, M. L. Garcia and Garcia-Piquer, A. and Gesa, L. and González-Álvarez, E. and Hernández, J. I. González and González-Peinado, R. and Guàrdia, J. and Guijarro, A. and de Guindos, E. and Hatzes, A. P. and Hauschildt, P. H. and Hedrosa, R. P. and Hermelo, I. and Arabi, R. Hernández and Otero, F. Hernández and Hintz, D. and Holgado, G. and Huber, A. and Huke, P. and Johnson, E. N. and de Juan, E. and Kehr, M. and Kemmer, J. and Kim, M. and Klüter, J. and Klutsch, A. and Labarga, F. and Labiche, N. and Lalitha, S. and Lampón, M. and Lara, L. M. and Launhardt, R. and Lázaro, F. J. and Lizon, J.-L. and Llamas, M. and Lodieu, N. and López del Fresno, M. and Salas, J. F. López and López-Santiago, J. and Madinabeitia, H. Magán and Mall, U. and Mancini, L. and Mandel, H. and Marfil, E. and Molina, J. A. Marin and Martin, E. L. and Martin-Fernández, P. and Martin-Ruiz, S. and Martinez-Rodriguez, H. and Marvin, C. J. and Mirabet, E. and Moya, A. and Naranjo, V. and Nelson, R. P. and Nortmann, L. and Nowak, G. and Ofir, A. and Pascual, J. and Pavlov, A. and Pedraz, S. and Medialdea, D. Pérez and Pérez-Calpena, A. and Perryman, M. A. C. and Rabaza, O. and Ballesta, A. Ramón and Rebolo, R. and Redondo, P. and Rix, H.-W. and Rodler, F. and Trinidad, A. Rodriguez and Sabotta, S. and Sadegi, S. and Salz, M. and Sánchez-Blanco, E. and Carrasco, M. A. Sánchez and Sánchez-López, A. and Sanz-Forcada, J. and Sarkis, P. and Sarmiento, L. F. and Schäfer, S. and Schlecker, M. and Schmitt, J. H. M. M. and Schöfer, P. and Solano, E. and Sota, A. and Stahl, O. and Stock, S. and Stuber, T. and Stürmer, J. and Suárez, J. C. and Tabernero, H. M. and Tulloch, S. M. and Veredas, G. and Vico-Linares, J. I. and Vilardell, F. and Wagner, K. and Winkler, J. and Wolthoff, V. and Yan, F. and Osorio, M. R. Zapatero},
  issn         = {0036-8075},
  language     = {eng},
  month        = {09},
  number       = {6460},
  pages        = {1441--1445},
  publisher    = {American Association for the Advancement of Science},
  series       = {Science},
  title        = {A giant exoplanet orbiting a very-low-mass star challenges planet formation models},
  url          = {http://dx.doi.org/10.1126/science.aax3198},
  doi          = {10.1126/science.aax3198},
  volume       = {365},
  year         = {2019},
}