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

A small star hosts a big planet - M dwarfs, the most common type of star, are low-mass objects that emit most of their faint light in the near-infrared, making it difficult to detect any orbiting exoplanets. Morales et al. have observed the nearby M dwarf GJ 3512 in the optical and near-infrared (se...

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Hauptverfasser: Morales, Juan Carlos (VerfasserIn) , Reffert, Sabine (VerfasserIn) , Quirrenbach, Andreas (VerfasserIn) , Kaminski, Adrian (VerfasserIn) , Seifert, Walter (VerfasserIn) , Kemmer, Jonas (VerfasserIn) , Kim, Minjae (VerfasserIn) , Klüter, Jonas (VerfasserIn) , Labiche, Nicolas (VerfasserIn) , Mandel, Holger (VerfasserIn) , Sadegi, Sepideh (VerfasserIn) , Stahl, Otmar (VerfasserIn) , Stock, Stephan (VerfasserIn) , Stürmer, Julian (VerfasserIn) , Wagner, Karl (VerfasserIn) , Wolthoff, Vera (VerfasserIn) , Henning, Thomas (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 27 September 2019
In: Science
Year: 2019, Jahrgang: 365, Heft: 6460, Pages: 1441-1445
ISSN:1095-9203
DOI:10.1126/science.aax3198
Online-Zugang:Verlag, Volltext: https://doi.org/10.1126/science.aax3198
Verlag: https://science.sciencemag.org/content/365/6460/1441
Volltext
Verfasserangaben:J. C. Morales, A. J. Mustill, I. Ribas, M. B. Davies, A. Reiners, F. F. Bauer, D. Kossakowski, E. Herrero, E. Rodríguez, M. J. López-González, C. Rodríguez-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. Benítez, 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. Díez-Alonso, R. Dorda, A. Emsenhuber, M. Fernández, A. Fernández-Martín, I. M. Ferro, B. Fuhrmeister, D. Galadí-Enríquez, I. Gallardo Cava, M. L. García 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. Marín Molina, E. L. Martín, P. Martín-Fernández, S. Martín-Ruiz, H. Martínez-Rodríguez, 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. Rodríguez 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

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520 |a A small star hosts a big planet - M dwarfs, the most common type of star, are low-mass objects that emit most of their faint light in the near-infrared, making it difficult to detect any orbiting exoplanets. Morales et al. have observed the nearby M dwarf GJ 3512 in the optical and near-infrared (see the Perspective by Laughlin). Periodic variations in the star's radial velocity show that it hosts a gas giant exoplanet on an eccentric orbit. The authors use simulations to show that such a large exoplanet around such a small star has implications for models of planet formation. - Science, this issue p. 1441; see also p. 1382 - 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. - A gas giant exoplanet orbits a low-mass star, a configuration that is difficult for planet formation models to reproduce. - A gas giant exoplanet orbits a low-mass star, a configuration that is difficult for planet formation models to reproduce. 
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Zapatero Osorio"]},"origin":[{"dateIssuedKey":"2019","dateIssuedDisp":"27 September 2019"}],"note":["Gesehen am 14.02.2020"],"recId":"1690071427","language":["eng"],"physDesc":[{"extent":"5 S."}],"relHost":[{"disp":"A giant exoplanet orbiting a very-low-mass star challenges planet formation modelsScience","titleAlt":[{"title":"Science / Magazine"},{"title":"Science classic"},{"title":"Science classic archiv 1880 - 1996"},{"title":"Science magazine"}],"part":{"text":"365(2019), 6460, Seite 1441-1445","year":"2019","volume":"365","extent":"5","issue":"6460","pages":"1441-1445"},"physDesc":[{"extent":"Online-Ressource"}],"title":[{"title_sort":"Science","title":"Science"}],"type":{"media":"Online-Ressource","bibl":"periodical"},"id":{"zdb":["2066996-3"],"eki":["341342882"],"issn":["1095-9203"]},"corporate":[{"role":"isb","display":"American Association for the Advancement of Science"}],"origin":[{"publisherPlace":"Washington, DC","dateIssuedKey":"1880","publisher":"American Association for the Advancement of Science","dateIssuedDisp":"1880-"}],"language":["eng"],"note":["Gesehen am 14.07.2023"],"recId":"341342882","name":{"displayForm":["AAAS"]},"pubHistory":["1.1880 - 3.1882; 1.1883 - 23.1894; N.S. 1.1895 -"]}],"title":[{"title":"A giant exoplanet orbiting a very-low-mass star challenges planet formation models","title_sort":"giant exoplanet orbiting a very-low-mass star challenges planet formation models"}],"type":{"media":"Online-Ressource","bibl":"article-journal"},"id":{"eki":["1690071427"],"doi":["10.1126/science.aax3198"]},"person":[{"given":"Juan Carlos","role":"aut","display":"Morales, Juan Carlos","family":"Morales"},{"display":"Reffert, Sabine","family":"Reffert","given":"Sabine","role":"aut"},{"given":"Andreas","role":"aut","display":"Quirrenbach, Andreas","family":"Quirrenbach"},{"display":"Kaminski, Adrian","family":"Kaminski","given":"Adrian","role":"aut"},{"display":"Seifert, Walter","family":"Seifert","given":"Walter","role":"aut"},{"role":"aut","given":"Jonas","family":"Kemmer","display":"Kemmer, Jonas"},{"family":"Kim","display":"Kim, Minjae","role":"aut","given":"Minjae"},{"given":"Jonas","role":"aut","display":"Klüter, Jonas","family":"Klüter"},{"display":"Labiche, Nicolas","family":"Labiche","given":"Nicolas","role":"aut"},{"family":"Mandel","display":"Mandel, Holger","role":"aut","given":"Holger"},{"display":"Sadegi, Sepideh","family":"Sadegi","given":"Sepideh","role":"aut"},{"given":"Otmar","role":"aut","display":"Stahl, Otmar","family":"Stahl"},{"family":"Stock","display":"Stock, Stephan","role":"aut","given":"Stephan"},{"display":"Stürmer, Julian","family":"Stürmer","given":"Julian","role":"aut"},{"given":"Karl","role":"aut","display":"Wagner, Karl","family":"Wagner"},{"role":"aut","given":"Vera","family":"Wolthoff","display":"Wolthoff, Vera"},{"display":"Henning, Thomas","family":"Henning","given":"Thomas","role":"aut"}]} 
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