GJ 367b: A dense, ultrashort-period sub-Earth planet transiting a nearby red dwarf star
K. W. F. LamCentre for Astronomy and Astrophysics, Technical University Berlin, 10585 Berlin, GermanySzilárd CsizmadiaInstitute of Planetary Research, German Aerospace Center, 12489 Berlin, GermanyN. Astudillo-DefruDepartamento de Matemática y Física Aplicadas, Universidad Católica de la Santísima Concepción, Concepción, ChileX. BonfılsUniversité Grenoble Alpes, Centre national de la recherche scientifique, Institut de Planétologie et d’Astrophysique de Grenoble, F-38000 Grenoble, FranceD. GandolfiDipartimento di Fisica, Università degli Studi di Torino, I-10125, Torino, ItalySebastiano PadovanInstitute of Planetary Research, German Aerospace Center, 12489 Berlin, GermanyM. EspositoThüringer Landessternwarte Tautenburg, D-07778 Tautenberg, GermanyC. HellierAstrophysics Group, Keele University, Staffordshire, ST5 5BG, UKTeruyuki HiranoDepartment of Earth and Planetary Sciences, Tokyo Institute of Technology, Tokyo, JapanJohn H. LivingstonDepartment of Astronomy, University of Tokyo, Tokyo, JapanF. MurgasDepartamento de Astrofísica, Universidad de La Laguna, 38206 La Laguna, Tenerife, SpainA. M. S. SmithInstitute of Planetary Research, German Aerospace Center, 12489 Berlin, GermanyKaren A. CollinsCenter for Astrophysics, Harvard and Smithsonian, Cambridge, MA, USAS. MathurDepartamento de Astrofísica, Universidad de La Laguna, 38206 La Laguna, Tenerife, SpainR. A. GarcíaAstrophysique, 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, FranceSteve B. HowellNASA Ames Research Center, Moffett Field, CA, USAN. SantosCentro de Astrofísica da Universidade do PortoFei DaiDivision of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USAG. RickerDepartment of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USAR. VanderspekDepartment of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USADavid W. LathamCenter for Astrophysics, Harvard and Smithsonian, Cambridge, MA, USASara SeagerDepartment of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge, MA, USAJoshua N. WinnDepartment of Astrophysical Sciences, Princeton University, Princeton, NJ, USAJon M. JenkinsNASA Ames Research Center, Moffett Field, CA, USASimon AlbrechtStellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, DenmarkJ. M. AlmenaraUniversité Grenoble Alpes, Centre national de la recherche scientifique, Institut de Planétologie et d’Astrophysique de Grenoble, F-38000 Grenoble, FranceÉtienne ArtigauUniversité Grenoble Alpes, Centre national de la recherche scientifique, Institut de Planétologie et d’Astrophysique de Grenoble, F-38000 Grenoble, FranceOscar BarragánSubdepartment of Astrophysics, Department of Physics, University of Oxford, Oxford, OX1 3RH, UKF. BouchyGeneva Observatory, University of Geneva, 1290 Versoix, SwitzerlandJ. CabreraUniversité Grenoble Alpes, Centre national de la recherche scientifique, Institut de Planétologie et d’Astrophysique de Grenoble, F-38000 Grenoble, FranceDavid CharbonneauCenter for Astrophysics, Harvard and Smithsonian, Cambridge, MA, USAP. ChaturvediThüringer Landessternwarte Tautenburg, D-07778 Tautenberg, GermanyAlexander ChaushevCentre for Astronomy and Astrophysics, Technical University Berlin, 10585 Berlin, GermanyJessie L. ChristiansenInfrared Processing and Analysis Center, Caltech, Pasadena, CA, USAWilliam D. CochranCenter for Planetary Systems Habitability and McDonald Observatory, The University of Texas, Austin, TX, USAJosé R. De MeideirosDepartamento de Física, Universidade Federal do Rio Grande do Norte, 59072-970 Natal, RN, BrazilX. DelfosseUniversité Grenoble Alpes, Centre national de la recherche scientifique, Institut de Planétologie et d’Astrophysique de Grenoble, F-38000 Grenoble, FranceR. F. DíazInternational 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, ArgentinaRené DoyonInstitut de Recherche sur les Exoplantes, Dpartement de Physique, Universit de Montral, Montral, QC, H3C 3J7, CanadaPhilipp EigmüllerInstitute of Planetary Research, German Aerospace Center, 12489 Berlin, GermanyP. FigueiraEuropean Southern Observatory, Vitacura, Santiago, ChileT. ForveilleUniversité Grenoble Alpes, Centre national de la recherche scientifique, Institut de Planétologie et d’Astrophysique de Grenoble, F-38000 Grenoble, FranceM. FridlundDepartment of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, 439 92 Onsala, SwedenG. GaisnéUniversité Grenoble Alpes, Centre national de la recherche scientifique, Institut de Planétologie et d’Astrophysique de Grenoble, F-38000 Grenoble, FranceElisa GoffoDipartimento di Fisica, Università degli Studi di Torino, I-10125, Torino, ItalyIskra GeorgievaDepartment of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, 439 92 Onsala, SwedenS. GrziwaRheinisches Institut für Umweltforschung an der Universität zu Köln, D-50931 Köln, GermanyE. W. GuentherThüringer Landessternwarte Tautenburg, D-07778 Tautenberg, GermanyA. P. HatzesThüringer Landessternwarte Tautenburg, D-07778 Tautenberg, GermanyMarshall C. JohnsonLas Cumbres Observatory, Goleta, CA, USAP. KábathAstronomical Institute, Czech Academy of Sciences, 25165 Ondřejov, Czech RepublicEmil KnudstrupStellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, DenmarkJ. KorthDepartment of Space, Earth and Environment, Astronomy and Plasma Physics, Chalmers University of Technology, 412 96 Gothenburg, SwedenPablo LewinJack J. LissauerGeological Sciences Department, Stanford University, CA, USAC. LovisGeneva Observatory, University of Geneva, 1290 Versoix, SwitzerlandR. LuqueDepartamento de Astrofísica, Universidad de La Laguna, 38206 La Laguna, Tenerife, SpainC. MeloEuropean Southern Observatory, Vitacura, Santiago, ChileE. MorganDepartment of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USARobert MorrisNASA Ames Research Center, Moffett Field, CA, USAM. MayorGeneva Observatory, University of Geneva, 1290 Versoix, SwitzerlandNorio NaritaAstrobiology Center, Tokyo, JapanH. L. M. OsborneMullard Space Science Laboratory, University College London, Dorking, Surrey, RH5 6NT, UKΕ. ΠάλληDepartamento de Astrofísica, Universidad de La Laguna, 38206 La Laguna, Tenerife, SpainF. PepeGeneva Observatory, University of Geneva, 1290 Versoix, SwitzerlandC. M. PerssonDepartment of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, 439 92 Onsala, SwedenSamuel N. QuinnCenter for Astrophysics, Harvard and Smithsonian, Cambridge, MA, USAH. RauerCentre for Astronomy and Astrophysics, Technical University Berlin, 10585 Berlin, GermanySeth RedfieldAstronomy Department and Van Vleck Observatory, Wesleyan University, Middletown, CT, USAJoshua E. SchliederNASA Goddard Space Flight Center, Greenbelt, MD, USAD. SégransanGeneva Observatory, University of Geneva, 1290 Versoix, SwitzerlandL. M. SerranoDipartimento di Fisica, Università degli Studi di Torino, I-10125, Torino, ItalyJeffrey C. SmithNASA Ames Research Center, Moffett Field, CA, USAJ. ŠubjakAstronomical Institute of Charles University, 180 00 Prague, Czech RepublicJoseph D. TwickenNASA Ames Research Center, Moffett Field, CA, USAS. UdryGeneva Observatory, University of Geneva, 1290 Versoix, SwitzerlandVincent Van EylenMullard Space Science Laboratory, University College London, Dorking, Surrey, RH5 6NT, UKMichael VezieDepartment of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USA
2021en
ABI
Аннотация
A nearby iron-rich sub-Earth planet The mass and radius of an exoplanet determine its mean density, which provides information about the possible interior structure. Lam et al . have identified a planet on a 7.7-hour orbit around a nearby red dwarf star. The authors determined the planet’s radius from the transit, then used radial velocity observations to measure the mass. They found a sub-Earth–sized planet with a density almost equivalent to pure iron. Its high surface temperature is close to the vaporization point of iron, suggesting that it is the iron core of a planet that has lost its outer mantle. —KTS
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