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GJ 367b: A dense, ultrashort-period sub-Earth planet transiting a nearby red dwarf star

Lam, K. W. F. and Csizmadia, Szilard and Astudillo-Defru, Nicola and Bonfils, Xavier and Gandolfi, D. and Padovan, Sebastiano and Esposito, M. and Hellier, C. and Hirano, T. and Livingston, J. and Murgas, F. and Smith, Alexis M. S. and Collins, K. A. and Mathur, S. and Garcia, R.A. and Howell, S. and Santos, N. C. and Dai, F. and Ricker, G. and Vanderspek, R. and Latham, D W and Seager, S. and Winn, J. N. and Jenkins, J. M. and Albrecht, S. and Almenara, J and Artigau, E. and Barragán, O. and Bouchy, F. and Cabrera Perez, Juan and Charbonneau, D. and Chaturvedi, P. and Chaushev, Alexander and Christiansen, J. and Cochran, W. and De Meideiros, J. and Delfosse, X. and Díaz, R. and Doyon, R. and Eigmüller, Philipp and Figueira, P. and Forveille, Th. and Fridlund, M. and Gaisné, G. and Goffo, E. and Georgieva, I. and Grziwa, S. and Guenther, E and Hatzes, A and Johnson, M. and Kabath, P. and Knudstrup, E. and Korth, J. and Lewin, P. and Lissauer, Jack J. and Lovis, C. and Luque, R. and Melo, C. and Morgan, E. H. and Morris, Robert and Mayor, M and Narita, N. and Osborne, H.L.M. and Palle, E. and Pepe, F and Persson, C. and Quinn, S. N. and Rauer, Heike and Redfield, S. and Schlieder, Joshua and Segransan, D and Serrano, L.M. and Smith, Jeffrey C. and Subjak, J. and Twicken, J.D. and Udry, S and Van Eylen, V. and Vezie, Michael (2021) GJ 367b: A dense, ultrashort-period sub-Earth planet transiting a nearby red dwarf star. Science, 374 (6572), pp. 1271-1275. American Association for the Advancement of Science (AAAS). doi: 10.1126/science.aay3253. ISSN 0036-8075.

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Official URL: https://www.science.org/doi/10.1126/science.aay3253

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 centimeter—close 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.

Item URL in elib:https://elib.dlr.de/148052/
Document Type:Article
Title:GJ 367b: A dense, ultrashort-period sub-Earth planet transiting a nearby red dwarf star
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Lam, K. W. F.kristine.lam (at) dlr.dehttps://orcid.org/0000-0002-9910-6088
Csizmadia, Szilardszilard.csizmadia (at) dlr.dehttps://orcid.org/0000-0001-6803-9698
Astudillo-Defru, NicolaDepartamento de Matemática y Física Aplicadas, Universidad Católica de la Santísima Concepción, Concepción, Chile.UNSPECIFIED
Bonfils, XavierUniversité Grenoble Alpes, CNRS, IPAG, Grenoble, FranceUNSPECIFIED
Gandolfi, D.Dipartimento di Fisica, Università di Torino, via P. Giuria 1, I-10125 Torino, ItalyUNSPECIFIED
Padovan, SebastianoSebastiano.Padovan (at) dlr.deUNSPECIFIED
Esposito, M.Thueringer Landessternwarte, Sternwarte 5, Tautenburg 5, D-07778 Tautenburg, GermanyUNSPECIFIED
Hellier, C.Astrophysics Group, Keele University, StaffordshireUNSPECIFIED
Hirano, T.Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Meguro-ku, Tokyo, JapanUNSPECIFIED
Livingston, J.Department of Astronomy, The University of Tokyo, 7-3-1 Bunkyo-ku, Tokyo 113-0033, JapanUNSPECIFIED
Murgas, F.Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna, 38206, La Laguna, Tenerife, SpainUNSPECIFIED
Smith, Alexis M. S.alexis.smith (at) dlr.deUNSPECIFIED
Collins, K. A.Center for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USAUNSPECIFIED
Mathur, S.Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, SpainUNSPECIFIED
Garcia, R.A.IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France; AIM, CEA, CNRS, Université Paris-Saclay, Université Paris Diderot, Sorbonne Paris Cité, F-91191 Gif-sur-Yvette, FranceUNSPECIFIED
Howell, S.NASA Ames Research Center, Moffett Field, CA 94035, USAUNSPECIFIED
Santos, N. C.Instituto de Astrofisica e Ciencias do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal; Departamento de Fisica e Astronomia, Faculdade de Ciencias, Universidade do Porto, Rua Campo Alegre, 4169-007 Porto, PortugalUNSPECIFIED
Dai, F.Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USAUNSPECIFIED
Ricker, G.Department of Physics and Kavli Institute for Astrophysics and Space Research, MIT, Cambridge, MA, 02139, USAUNSPECIFIED
Vanderspek, R.Department of Physics and Kavli Institute for Astrophysics and Space Research, MIT, Cambridge, MA, 02139, USAUNSPECIFIED
Latham, D WHarvard-Smithonian Center for Astrophysics, CambridgeUNSPECIFIED
Seager, S.Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MAUNSPECIFIED
Winn, J. N.Princeton University, Department of Astrophysical Sciences, 4 Ivy Lane, Princeton, NJ 08544 USAUNSPECIFIED
Jenkins, J. M.NASA Ames Research Center, Moffett Field, CA, 94035, USAUNSPECIFIED
Albrecht, S.Stellar Astrophysics Centre, Deparment of Physics and Astronomy, Aarhus University, Ny Munkegrade 120, 8000 Aarhus C, DenmarkUNSPECIFIED
Almenara, JIPAG, Univ. Grenoble Alpes, CNRS, F-38000 Grenoble, FranceUNSPECIFIED
Artigau, E.Université Grenoble Alpes, Centre national de la recherche scientifique, Institut de Planétologie et d’Astrophysique de Grenoble, F-38000 Grenoble, FranceUNSPECIFIED
Barragán, O.Sub-department of Astrophysics, Department of Physics, Universityof Oxford, Oxford OX1 3RH, UKUNSPECIFIED
Bouchy, F.Geneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290 Versoix, SwitzerlandUNSPECIFIED
Cabrera Perez, JuanJuan.Cabrera (at) dlr.dehttps://orcid.org/0000-0001-6653-5487
Charbonneau, D.Center for Astrophysics|Harvard & Smithsonian, 60 Garden Street,Cambridge, MA 02138, USAUNSPECIFIED
Chaturvedi, P.Thüringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenburg, GermanyUNSPECIFIED
Chaushev, AlexanderCenter for Astronomy and Astrophysics, TU Berlin, Berlin, GermanyUNSPECIFIED
Christiansen, J.Infrared Processing and Analysis Center, Caltech, Pasadena, CA, USAUNSPECIFIED
Cochran, W.Center for Planetary Systems Habitability and McDonald Observatory, The University of Texas, Austin, TX, USAUNSPECIFIED
De Meideiros, J.Departamento de Física, Universidade Federal do Rio Grande do Norte, 59072-970 Natal, RN, BrazilUNSPECIFIED
Delfosse, X.Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, FranceUNSPECIFIED
Díaz, R.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, ArgentinaUNSPECIFIED
Doyon, R.Institut de Recherche sur les Exoplanètes (IREx), Departement de Physique, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, QC H3C3J7, CanadaUNSPECIFIED
Eigmüller, PhilippPhilipp.Eigmueller (at) dlr.dehttps://orcid.org/0000-0003-4096-0594
Figueira, P.European Southern Observatory, Alonso de Cordova 3107, Vitacura, Santiago, Chile; Instituto de Astrofisica e Ciencias do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, PortugalUNSPECIFIED
Forveille, Th.Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, FranceUNSPECIFIED
Fridlund, M.Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, 439 92, Onsala, Sweden; Leiden Observatory, Leiden University, 2333CA, Leiden, The NetherlandsUNSPECIFIED
Gaisné, G.Université Grenoble Alpes, Centre national de la recherche scientifique, Institut de Planétologie et d’Astrophysique de Grenoble, F-38000 Grenoble, FranceUNSPECIFIED
Goffo, E.Dipartimento di Fisica, Università degli Studi di Torino, via PietroGiuria 1, I-10125, Torino, Italy ; Thüringer Landessternwarte Tautenburg, GermanyUNSPECIFIED
Georgieva, I.Department of Space, Earth and Environment, Chalmers University ofTechnology, Onsala Space Observatory, SE-439 92 Onsala, SwedenUNSPECIFIED
Grziwa, S.Rheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, 50931 Köln, GermanyUNSPECIFIED
Guenther, EThüringer Landessternwarte TautenburgUNSPECIFIED
Hatzes, AThüringer Landessternwarte TautenburgUNSPECIFIED
Johnson, M.Las Cumbres Observatory, Goleta, CA, USAUNSPECIFIED
Kabath, P.Astronomical Institute ASCR, Fricova 298, 25165 Ondrejov, Czech RepublicUNSPECIFIED
Knudstrup, E.Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, DenmarkUNSPECIFIED
Korth, J.Rheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, D-50931 Köln, GermanyUNSPECIFIED
Lewin, P.The Maury Lewin Astronomical Observatory, Glendora, CA, USAUNSPECIFIED
Lissauer, Jack J.NASA Ames Research Center, Moffett Field, CA, USA ; Geological Sciences Department, Stanford University, CA, USAUNSPECIFIED
Lovis, C.Geneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290, Versoix, SwitzerlandUNSPECIFIED
Luque, R.Instituto de Astrofisica de Canarias, C/ Via Lactea s/n, 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna, 38206, Tenerife, SpainUNSPECIFIED
Melo, C.European Souther Observatory, Vitacura, Santiago, ChileUNSPECIFIED
Morgan, E. H.Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USAUNSPECIFIED
Morris, RobertNASA Ames Research Center, Moffett Field, CA 94035, USA; SETI Institute, 189 Bernardo Ave., Suite 200, Mountain View, CA 94043, USAUNSPECIFIED
Mayor, MObservatoire de GeneveUNSPECIFIED
Narita, N.Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Department of Astronomy, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan; National Astronomical Observatory of Japan, NINS, 2-21-1 Osawa, Mitaka, Tokyo,UNSPECIFIED
Osborne, H.L.M.Mullard Space Science Laboratory, University College London, HolmburySt Mary, Dorking, Surrey RH5 6NT, UKUNSPECIFIED
Palle, E.Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain | Departamento de Astrofisica, Universidad de La Laguna, 38206 La Laguna, SpainUNSPECIFIED
Pepe, FObservatoire de GeneveUNSPECIFIED
Persson, C.Department of Earth and Space Sciences, Chalmers University of Technology, Onsala Space Observatory, SE-439 92 Onsala, SwedenUNSPECIFIED
Quinn, S. N.Harvard-Smithsonian Center for Astrophysics, 60 Garden St, Cambridge, MA 02138, USAUNSPECIFIED
Rauer, Heikeheike.rauer (at) dlr.dehttps://orcid.org/0000-0002-6510-1828
Redfield, S.Astronomy Department and Van Vleck Observatory, Wesleyan University, Middletown, CT, 06459, USAUNSPECIFIED
Schlieder, JoshuaNASA Goddard Space Flight Center, 8800 Greenbelt Road, MD, USAUNSPECIFIED
Segransan, DObservatoire de GeneveUNSPECIFIED
Serrano, L.M.Dipartimento di Fisica, Università degli Studi di Torino, via PietroGiuria 1, I-10125, Torino, Italyhttps://orcid.org/0000-0001-9211-3691
Smith, Jeffrey C.SETI Institute/NASA Ames Research Center, Moffett Field, CA, 94035, USAUNSPECIFIED
Subjak, J.Astronomical Institute, Czech Academy of Sciences, Fricova 298, 25165, Ondrejov, Czech Republic; Astronomical Institute, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 2027/3, 12116, Prague, Czech RepublicUNSPECIFIED
Twicken, J.D.NASA Ames Research Center, Moffett Field, CA 94035, USA; SETI Institute, Mountain View, CA 94043, USAUNSPECIFIED
Udry, SObservatoire de GenèveUNSPECIFIED
Van Eylen, V.Mullard Space Science Laboratory, University College London,Holmbury St Mary, Dorking, Surrey RH5 6NT, UKUNSPECIFIED
Vezie, MichaelDepartment of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USAUNSPECIFIED
Date:3 December 2021
Journal or Publication Title:Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:374
DOI :10.1126/science.aay3253
Page Range:pp. 1271-1275
Publisher:American Association for the Advancement of Science (AAAS)
ISSN:0036-8075
Status:Published
Keywords:ASTRONOMY; PLANET SCI, Astrophysics - Earth and Planetary Astrophysics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project PLATO - PMC and Science
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Institute of Planetary Research > Leitungsbereich PF
Deposited By: Lam, Wai Fun
Deposited On:07 Jan 2022 12:48
Last Modified:07 Jan 2022 12:48

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