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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, Davide and Padovan, Sebastiano and Esposito, Massimiliano and Hellier, Coel and Hirano, Teruyuki and Livingston, John and Murgas, Felipe and Smith, Alexis M.S. and Collins, Karen A. and Mathur, Savita and Garcia, Rafael A. and Howell, Steve B. and Santos, Nuno C. and Dai, Fei and Ricker, George and Vanderspek, Roland and Latham, David W. and Seager, Sara and Winn, Joshua N. and Jenkins, Jon M. and Albrecht, Simon and Almenara-Villa, Jose-Manuel and Artigau, Etienne and Barragan, Oscar and Bouchy, Françcois and Cabrera, Juan and Charbonneau, David and Chaturvedi, Priyanka and Chaushev, Alexander and Christiansen, Jessie L. and Cochran, William D. and De Meideiros, José R. and Delfosse, Xavier and Díaz, Rodrigo F. and Doyon, R. and Eigmüller, Philipp and Figueira, Pedro and Forveille, Thierry and Fridlund, Malcolm and Gaisné, Guillaume and Goffo, Elisa and Georgieva, Iskra and Grziwa, Sascha and Guenther, Eike and Hatzes, Artie P. and Johnson, Marshall C. and Kabath, Petr and Knudstrup, Emil and Korth, Judith and Lewin, Pablo and Lissauer, Jack J. and Lovis, Christophe and Luque, Rafael and Melo, Claudio and Morgan, Edward and Morris, Robert and Mayor, Michel and Narita, Norio and Osborne, Hannah L. M. and Palle, Enric and Pepe, Francesco and Persson, Carina M. and Quinn, Samuel N. and Rauer, Heike and Redfield, Seth and Schlieder, Joshua E. and Ségransan, Damien and Serrano, Luisa Maria and Smith, Jeffrey C. and Subjak, Jan and Twicken, Joseph D. and Udry, Stephane and Van Eylen, Vincent and Vezie, Michael (2022) GJ 367b: A dense, ultrashort-period sub-Earth planet transiting a nearby red dwarf star. Exoplanets IV, 1-6 May 2022, Las Vegas, USA.

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Official URL: https://baas.aas.org/pub/2022n5i104p02/release/1?readingCollection=b328d6e0

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 present the work from Lam et al. 2021 (Science, 374, 1271) and 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/190478/
Document Type:Conference or Workshop Item (Speech)
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.deUNSPECIFIED
Csizmadia, Szilardszilard.csizmadia (at) dlr.deUNSPECIFIED
Astudillo-Defru, NicolaDepartamento de Matemática y Física Aplicadas, Universidad Católica de la Santísima Concepción, Concepción, Chile.UNSPECIFIED
Bonfils, XavierUniversity of Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, Francehttps://orcid.org/0000-0001-9003-8894
Gandolfi, DavideDipartimento di Fisica, Universita degli Studi di Torino, via Pietro Giuria 1, I-10125, Torino, Italy ); 0000-0001-8627-9628UNSPECIFIED
Padovan, SebastianoWorkGroup Solutions GmbH at European Organisation for the Exploitation of Meteorological SatellitesUNSPECIFIED
Esposito, MassimilianoThuringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenberg, GermanyUNSPECIFIED
Hellier, CoelAstrophysics Group, Keele University, Staffordshire, ST5 5BG, UKUNSPECIFIED
Hirano, TeruyukiAstrobiology Center, 2-21-1 Osawa, Mitaka, TokyoUNSPECIFIED
Livingston, JohnAstrobiology Center, 2-21-1 Osawa, Mitaka, TokyoUNSPECIFIED
Murgas, FelipeInstituto de Astrof ́ısica de Canarias (IAC), E-38205 La Laguna, Tenerife,Spainhttps://orcid.org/0000-0001-9087-1245
Smith, Alexis M.S.alexis.smith (at) dlr.dehttps://orcid.org/0000-0002-2386-4341
Collins, Karen A.Center for Astrophysics, Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USAhttps://orcid.org/0000-0001-6588-9574
Mathur, SavitaInstituto de Astrofisica de Canarias, C/ Via Lactea s/n, E-38205 La Laguna, Spain; Departamento de Astrofisica, Universidad de La Laguna, E-38206 La Laguna, SpainUNSPECIFIED
Garcia, Rafael A.Laboratoire AIM, CEA/DSM---CNRS---Univ. Paris Diderot - IRFU/SAp, Centre de Saclay, F-91191 Gif-sur-Yvette, FranceUNSPECIFIED
Howell, Steve B.NASA Ames Research Center, Moffett Field, CA 94035, USAhttps://orcid.org/0000-0002-2532-2853
Santos, Nuno C.Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Porto, Portugal; Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Porto, PortugalUNSPECIFIED
Dai, FeiCalifornia Institute of TechnologyUNSPECIFIED
Ricker, GeorgeDepartment of Physics, and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USAUNSPECIFIED
Vanderspek, RolandDepartment of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USAUNSPECIFIED
Latham, David W.Center for Astrophysics, Harvard & Smithsonian, 60 Garden St, Cambridge, MA 02138, USAUNSPECIFIED
Seager, SaraDepartment of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USA; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA; DUNSPECIFIED
Winn, Joshua N.Department of Astrophysics Sciences, Princeton University, 4 Ivy Lane, Priceton, NJ 08544, USAUNSPECIFIED
Jenkins, Jon M.NASA Ames Research Center, Moffett Field, CA, USAUNSPECIFIED
Albrecht, SimonStellar Astrophysics Centre, Dep. of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, DenmarkUNSPECIFIED
Almenara-Villa, Jose-ManuelUniversity of Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, Francehttps://orcid.org/0000-0003-3208-9815
Artigau, EtienneUniversite de MontrealUNSPECIFIED
Barragan, OscarOxford Astrophysics, Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UKUNSPECIFIED
Bouchy, FrançcoisObservatoire de Genève, Université de Genève, 51 Ch. des Maillettes, CH-1290 Sauverny, SwitzerlandUNSPECIFIED
Cabrera, Juanjuan.cabrera (at) dlr.dehttps://orcid.org/0000-0001-6653-5487
Charbonneau, DavidCenter for Astrophysics, Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USAUNSPECIFIED
Chaturvedi, PriyankaThuringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenberg, GermanyUNSPECIFIED
Chaushev, AlexanderUC IrvineUNSPECIFIED
Christiansen, Jessie L.NASA Exoplanet Science Institute, Caltech, Pasadena, CA, USAUNSPECIFIED
Cochran, William D.University of Texas, AustinUNSPECIFIED
De Meideiros, José R.Departamento de Física, Universidade Federal do Rio Grande do NorteUNSPECIFIED
Delfosse, XavierUniversité Grenoble Alpes, Centre national de la recherche scienti�que, Institut de Planétologie et d’Astrophysique de GrenobleUNSPECIFIED
Díaz, Rodrigo F.Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina; Instituto de Astronomía y Física del Espacio (IAFE), CONICET - Universidad de Buenos Aires, Buenos Aires, Argentina; International Center for Advanced StudiesUNSPECIFIED
Doyon, R.Universite de MontrealUNSPECIFIED
Eigmüller, PhilippPhilipp.Eigmueller (at) dlr.dehttps://orcid.org/0000-0003-4096-0594
Figueira, PedroInstituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Porto, Portugal; European Southern Observatory, Santiago, ChileUNSPECIFIED
Forveille, ThierryUniversité Grenoble Alpes, Centre national de la recherche scienti�que, Institut de Planétologie et d’Astrophysique de GrenobleUNSPECIFIED
Fridlund, MalcolmDepartment of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, SE-439 92 Onsala, Sweden ; Leiden Observatory, University of Leiden, PO Box 9513, 2300 RA, Leiden, The Netherlands 0000-0003-2180-9936UNSPECIFIED
Gaisné, GuillaumeUniversité Grenoble Alpes, Centre national de la recherche scienti�que, Institut de Planétologie et d’Astrophysique de GrenobleUNSPECIFIED
Goffo, ElisaDipartimento di Fisica, Università degli Studi di Torino, via PietroGiuria 1, I-10125, Torino, Italy ; Thüringer Landessternwarte Tautenburg, GermanyUNSPECIFIED
Georgieva, IskraDepartment of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, SE-439 92 Onsala, SwedenUNSPECIFIED
Grziwa, SaschaRheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, D-50931 Köln, GermanyUNSPECIFIED
Guenther, EikeThüringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenberg, GermanyUNSPECIFIED
Hatzes, Artie P.Thuringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenberg, GermanyUNSPECIFIED
Johnson, Marshall C.Department of Astronomy, The Ohio State University, 140 West 18th Ave., Columbus, OH 43210, USAUNSPECIFIED
Kabath, PetrAstronomical Institute, Czech Academy of Sciences, Fricova 298, 25165, Ondrejov, Czech Republic 0000-0002-1623-5352UNSPECIFIED
Knudstrup, EmilStellar Astrophysics Centre, Dep. of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, DenmarkUNSPECIFIED
Korth, JudithDepartment of Space, Earth and Environment, Astronomy and PlasmaPhysics, Chalmers University of Technology, SE-412 96 Gothenburg, SwedenUNSPECIFIED
Lewin, PabloThe Maury Lewin Astronomical ObservatoryUNSPECIFIED
Lissauer, Jack J.NASA Ames Research Center, Moffett Field, CA, USA ; Geological Sciences Department, Stanford University, CA, USAUNSPECIFIED
Lovis, ChristopheGeneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290, Versoix, SwitzerlandUNSPECIFIED
Luque, RafaelInstituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía s/n, E-18008 Granada, Spainhttps://orcid.org/0000-0002-4671-2957
Melo, ClaudioEuropean Southern ObservatoryUNSPECIFIED
Morgan, EdwardMITUNSPECIFIED
Morris, RobertNASA Ames Research Center, Moffett Field, CA 94035, USA; SETI Institute, 189 Bernardo Ave., Suite 200, Mountain View, CA 94043, USAUNSPECIFIED
Mayor, MichelGeneva ObservatoryUNSPECIFIED
Narita, NorioDepartment of Astronomy, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan; Instituto de Astrofisica de Canarias, C/ Via Lactea s/n, E-38205 La Laguna, Spain; Astrobiology Center, NINS, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan ; NationUNSPECIFIED
Osborne, Hannah L. M.Mullard Space Science Laboratory, University College London, Holmbury St Mary, Dorking, Surrey RH5 6NT, UKUNSPECIFIED
Palle, EnricInstituto de Astrofisica de Canarias, C/ Via Lactea s/n, E-38205 La Laguna, Spain; Departamento de Astrofisica, Universidad de La Laguna, E-38206 La Laguna, SpainUNSPECIFIED
Pepe, FrancescoGeneva ObservatoryUNSPECIFIED
Persson, Carina M.Department of Space, Earth and Environmanet, Chalmers University of Technology, Onsala space Observatory, SE-439 92 Onsala SwedenUNSPECIFIED
Quinn, Samuel N.Center for Astrophysics | Harvard and Smithsonian, Cambridge, MA, USAhttps://orcid.org/0000-0002-8964-8377
Rauer, Heikeheike.rauer (at) dlr.deUNSPECIFIED
Redfield, SethAstronomy Department and Van Vleck Observatory, Wesleyan University, Middletown, CT 06459, USAUNSPECIFIED
Schlieder, Joshua E.NASA Goddard Space Flight Center, Exoplanets and Stellar Astrophysics Laboratory (Code 667), Greenbelt, MD, USAUNSPECIFIED
Ségransan, DamienGeneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290 Versoix, SwitzerlandUNSPECIFIED
Serrano, Luisa MariaDipartimento di Fisica, Universita degli Studi di Torino, via Pietro Giuria 1, I-10125, Torino, Italy ); 0000-0001-8627-9628UNSPECIFIED
Smith, Jeffrey C.SETI Institute/NASA Ames Research Center, Moffett Field, CA, 94035, USAUNSPECIFIED
Subjak, JanAstronomical Institute, Czech Academy of Sciences, Friˇcova 298, CZ-25165Ondˇrejov, Czech RepublicUNSPECIFIED
Twicken, Joseph D.NASA Ames Research Center, Moffett Field, CA 94035, USA; SETI Institute, 189 Bernardo Ave., Suite 200, Mountain View, CA 94043, USAUNSPECIFIED
Udry, StephaneObservatoire Astronomique de l'Université de Genève, 51 Ch. des Maillettes, CH-1290 Versoix, SwitzerlandUNSPECIFIED
Van Eylen, VincentMullard 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:2022
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:54
Page Range:104.02
Series Name:Bulletin of the AAS
Status:Published
Keywords:ASTRONOMY; PLANET SCI; Astrophysics - Earth and Planetary Astrophysics
Event Title:Exoplanets IV
Event Location:Las Vegas, USA
Event Type:international Conference
Event Dates:1-6 May 2022
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:21 Nov 2022 14:26
Last Modified:21 Nov 2022 14:26

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