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GJ 367b: A dense, ultrashort-period sub-Earth planet transiting a nearby red dwarf star.
Lam, Kristine W F; Csizmadia, Szilárd; Astudillo-Defru, Nicola; Bonfils, Xavier; Gandolfi, Davide; Padovan, Sebastiano; Esposito, Massimiliano; Hellier, Coel; Hirano, Teruyuki; Livingston, John; Murgas, Felipe; Smith, Alexis M S; Collins, Karen A; Mathur, Savita; Garcia, Rafael A; Howell, Steve B; Santos, Nuno C; Dai, Fei; Ricker, George R; Vanderspek, Roland; Latham, David W; Seager, Sara; Winn, Joshua N; Jenkins, Jon M; Albrecht, Simon; Almenara, Jose M; Artigau, Etienne; Barragán, Oscar; Bouchy, François; Cabrera, Juan; Charbonneau, David; Chaturvedi, Priyanka; Chaushev, Alexander; Christiansen, Jessie L; Cochran, William D; De Meideiros, José R; Delfosse, Xavier; Díaz, Rodrigo F; Doyon, René; Eigmüller, Philipp; Figueira, Pedro; Forveille, Thierry; Fridlund, Malcolm; Gaisné, Guillaume; Goffo, Elisa; Georgieva, Iskra; Grziwa, Sascha; Guenther, Eike; Hatzes, Artie P; Johnson, Marshall C.
Afiliación
  • Lam KWF; Centre for Astronomy and Astrophysics, Technical University Berlin, 10585 Berlin, Germany.
  • Csizmadia S; Institute of Planetary Research, German Aerospace Center, 12489 Berlin, Germany.
  • Astudillo-Defru N; Institute of Planetary Research, German Aerospace Center, 12489 Berlin, Germany.
  • Bonfils X; Departamento de Matemática y Física Aplicadas, Universidad Católica de la Santísima Concepción, Concepción, Chile.
  • Gandolfi D; Université Grenoble Alpes, Centre national de la recherche scientifique, Institut de Planétologie et d'Astrophysique de Grenoble, F-38000 Grenoble, France.
  • Padovan S; Dipartimento di Fisica, Università degli Studi di Torino, I-10125, Torino, Italy.
  • Esposito M; Institute of Planetary Research, German Aerospace Center, 12489 Berlin, Germany.
  • Hellier C; WorkGroup Solutions GmbH at European Organisation for the Exploitation of Meteorological Satellites, 64295 Darmstadt, Germany.
  • Hirano T; Thüringer Landessternwarte Tautenburg, D-07778 Tautenberg, Germany.
  • Livingston J; Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK.
  • Murgas F; Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Tokyo, Japan.
  • Smith AMS; Department of Astronomy, University of Tokyo, Tokyo, Japan.
  • Collins KA; Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain.
  • Mathur S; Departamento de Astrofísica, Universidad de La Laguna, 38206 La Laguna, Tenerife, Spain.
  • Garcia RA; Institute of Planetary Research, German Aerospace Center, 12489 Berlin, Germany.
  • Howell SB; Center for Astrophysics, Harvard and Smithsonian, Cambridge, MA, USA.
  • Santos NC; Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain.
  • Dai F; Departamento de Astrofísica, Universidad de La Laguna, 38206 La Laguna, Tenerife, Spain.
  • Ricker GR; Institut de Recherche sur les Lois Fondamentales de l'Universe, Commissariat à l'Énergie Atomique et aux énergies alternatives, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
  • Vanderspek R; Astrophysique, Instrumentation et modélisation, Commissariat à l'Énergie Atomique et aux énergies alternatives, Centre National de la recherche scientifique, Université Paris-Saclay, Université Paris Diderot, Sorbonne Paris Cité, F-91191 Gif-sur-Yvette, France.
  • Latham DW; NASA Ames Research Center, Moffett Field, CA, USA.
  • Seager S; Instituto de Astrofísica e Ciênciasdo Espaço, Universidade do Porto, Centro de Astrofísica da Universidade do Porto, 4150-762 Porto, Portugal.
  • Winn JN; Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal.
  • Jenkins JM; Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA.
  • Albrecht S; Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USA.
  • Almenara JM; Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USA.
  • Artigau E; Center for Astrophysics, Harvard and Smithsonian, Cambridge, MA, USA.
  • Barragán O; Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USA.
  • Bouchy F; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA.
  • Cabrera J; Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge, MA, USA.
  • Charbonneau D; Department of Astrophysical Sciences, Princeton University, Princeton, NJ, USA.
  • Chaturvedi P; NASA Ames Research Center, Moffett Field, CA, USA.
  • Chaushev A; Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark.
  • Christiansen JL; Université Grenoble Alpes, Centre national de la recherche scientifique, Institut de Planétologie et d'Astrophysique de Grenoble, F-38000 Grenoble, France.
  • Cochran WD; Université Grenoble Alpes, Centre national de la recherche scientifique, Institut de Planétologie et d'Astrophysique de Grenoble, F-38000 Grenoble, France.
  • De Meideiros JR; Subdepartment of Astrophysics, Department of Physics, University of Oxford, Oxford, OX1 3RH, UK.
  • Delfosse X; Geneva Observatory, University of Geneva, 1290 Versoix, Switzerland.
  • Díaz RF; Université Grenoble Alpes, Centre national de la recherche scientifique, Institut de Planétologie et d'Astrophysique de Grenoble, F-38000 Grenoble, France.
  • Doyon R; Center for Astrophysics, Harvard and Smithsonian, Cambridge, MA, USA.
  • Eigmüller P; Thüringer Landessternwarte Tautenburg, D-07778 Tautenberg, Germany.
  • Figueira P; Centre for Astronomy and Astrophysics, Technical University Berlin, 10585 Berlin, Germany.
  • Forveille T; Infrared Processing and Analysis Center, Caltech, Pasadena, CA, USA.
  • Fridlund M; Center for Planetary Systems Habitability and McDonald Observatory, The University of Texas, Austin, TX, USA.
  • Gaisné G; Departamento de Física, Universidade Federal do Rio Grande do Norte, 59072-970 Natal, RN, Brazil.
  • Goffo E; Université Grenoble Alpes, Centre national de la recherche scientifique, Institut de Planétologie et d'Astrophysique de Grenoble, F-38000 Grenoble, France.
  • Georgieva I; International Center for Advanced Studies and Instituto de Ciencias Físicas (Consejo Nacional de Investigaciones Científicas y Técnicas), Escuela de Ciencia y Tecnología - Universidad Nacional de San Martín, Campus Miguelete, Buenos Aires, Argentina.
  • Grziwa S; Institut de Recherche sur les Exoplantes, Dpartement de Physique, Universit de Montral, Montral, QC, H3C 3J7, Canada.
  • Guenther E; Institute of Planetary Research, German Aerospace Center, 12489 Berlin, Germany.
  • Hatzes AP; Instituto de Astrofísica e Ciênciasdo Espaço, Universidade do Porto, Centro de Astrofísica da Universidade do Porto, 4150-762 Porto, Portugal.
  • Johnson MC; European Southern Observatory, Vitacura, Santiago, Chile.
Science ; 374(6572): 1271-1275, 2021 Dec 03.
Article en En | MEDLINE | ID: mdl-34855492
ABSTRACT
Ultrashort-period (USP) exoplanets have orbital periods shorter than 1 day. Precise masses and radii of USP exoplanets could provide constraints on their unknown formation and evolution processes. We report the detection and characterization of the USP planet GJ 367b using high-precision photometry and radial velocity observations. GJ 367b orbits a bright (V-band magnitude of 10.2), nearby, and red (M-type) dwarf star every 7.7 hours. GJ 367b has a radius of 0.718 ± 0.054 Earth-radii and a mass of 0.546 ± 0.078 Earth-masses, making it a sub-Earth planet. The corresponding bulk density is 8.106 ± 2.165 grams per cubic centimeter­close to that of iron. An interior structure model predicts that the planet has an iron core radius fraction of 86 ± 5%, similar to that of Mercury's interior.
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Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Science Año: 2021 Tipo del documento: Article País de afiliación: Alemania
Texto completo
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Science Año: 2021 Tipo del documento: Article País de afiliación: Alemania