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:

Authors	Institution or Email of Authors	Author's ORCID iD
Lam, K. W. F.	kristine.lam (at) dlr.de	https://orcid.org/0000-0002-9910-6088
Csizmadia, Szilard	szilard.csizmadia (at) dlr.de	https://orcid.org/0000-0001-6803-9698
Astudillo-Defru, Nicola	Departamento de Matemática y Física Aplicadas, Universidad Católica de la Santísima Concepción, Concepción, Chile.	UNSPECIFIED
Bonfils, Xavier	Université Grenoble Alpes, CNRS, IPAG, Grenoble, France	UNSPECIFIED
Gandolfi, D.	Dipartimento di Fisica, Università di Torino, via P. Giuria 1, I-10125 Torino, Italy	UNSPECIFIED
Padovan, Sebastiano	Sebastiano.Padovan (at) dlr.de	UNSPECIFIED
Esposito, M.	Thueringer Landessternwarte, Sternwarte 5, Tautenburg 5, D-07778 Tautenburg, Germany	UNSPECIFIED
Hellier, C.	Astrophysics Group, Keele University, Staffordshire	UNSPECIFIED
Hirano, T.	Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Meguro-ku, Tokyo, Japan	UNSPECIFIED
Livingston, J.	Department of Astronomy, The University of Tokyo, 7-3-1 Bunkyo-ku, Tokyo 113-0033, Japan	UNSPECIFIED
Murgas, F.	Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna, 38206, La Laguna, Tenerife, Spain	UNSPECIFIED
Smith, Alexis M. S.	alexis.smith (at) dlr.de	UNSPECIFIED
Collins, K. A.	Center for Astrophysics \| Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA	UNSPECIFIED
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, Spain	UNSPECIFIED
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, France	UNSPECIFIED
Howell, S.	NASA Ames Research Center, Moffett Field, CA 94035, USA	UNSPECIFIED
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, Portugal	UNSPECIFIED
Dai, F.	Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA	UNSPECIFIED
Ricker, G.	Department of Physics and Kavli Institute for Astrophysics and Space Research, MIT, Cambridge, MA, 02139, USA	UNSPECIFIED
Vanderspek, R.	Department of Physics and Kavli Institute for Astrophysics and Space Research, MIT, Cambridge, MA, 02139, USA	UNSPECIFIED
Latham, D W	Harvard-Smithonian Center for Astrophysics, Cambridge	UNSPECIFIED
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, MA	UNSPECIFIED
Winn, J. N.	Princeton University, Department of Astrophysical Sciences, 4 Ivy Lane, Princeton, NJ 08544 USA	UNSPECIFIED
Jenkins, J. M.	NASA Ames Research Center, Moffett Field, CA, 94035, USA	UNSPECIFIED
Albrecht, S.	Stellar Astrophysics Centre, Deparment of Physics and Astronomy, Aarhus University, Ny Munkegrade 120, 8000 Aarhus C, Denmark	UNSPECIFIED
Almenara, J	IPAG, Univ. Grenoble Alpes, CNRS, F-38000 Grenoble, France	UNSPECIFIED
Artigau, E.	Université Grenoble Alpes, Centre national de la recherche scientifique, Institut de Planétologie et d’Astrophysique de Grenoble, F-38000 Grenoble, France	UNSPECIFIED
Barragán, O.	Sub-department of Astrophysics, Department of Physics, Universityof Oxford, Oxford OX1 3RH, UK	UNSPECIFIED
Bouchy, F.	Geneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290 Versoix, Switzerland	UNSPECIFIED
Cabrera Perez, Juan	Juan.Cabrera (at) dlr.de	https://orcid.org/0000-0001-6653-5487
Charbonneau, D.	Center for Astrophysics\|Harvard & Smithsonian, 60 Garden Street,Cambridge, MA 02138, USA	UNSPECIFIED
Chaturvedi, P.	Thüringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenburg, Germany	UNSPECIFIED
Chaushev, Alexander	Center for Astronomy and Astrophysics, TU Berlin, Berlin, Germany	UNSPECIFIED
Christiansen, J.	Infrared Processing and Analysis Center, Caltech, Pasadena, CA, USA	UNSPECIFIED
Cochran, W.	Center for Planetary Systems Habitability and McDonald Observatory, The University of Texas, Austin, TX, USA	UNSPECIFIED
De Meideiros, J.	Departamento de Física, Universidade Federal do Rio Grande do Norte, 59072-970 Natal, RN, Brazil	UNSPECIFIED
Delfosse, X.	Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, France	UNSPECIFIED
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, Argentina	UNSPECIFIED
Doyon, R.	Institut de Recherche sur les Exoplanètes (IREx), Departement de Physique, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, QC H3C3J7, Canada	UNSPECIFIED
Eigmüller, Philipp	Philipp.Eigmueller (at) dlr.de	https://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, Portugal	UNSPECIFIED
Forveille, Th.	Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, France	UNSPECIFIED
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 Netherlands	UNSPECIFIED
Gaisné, G.	Université Grenoble Alpes, Centre national de la recherche scientifique, Institut de Planétologie et d’Astrophysique de Grenoble, F-38000 Grenoble, France	UNSPECIFIED
Goffo, E.	Dipartimento di Fisica, Università degli Studi di Torino, via PietroGiuria 1, I-10125, Torino, Italy ; Thüringer Landessternwarte Tautenburg, Germany	UNSPECIFIED
Georgieva, I.	Department of Space, Earth and Environment, Chalmers University ofTechnology, Onsala Space Observatory, SE-439 92 Onsala, Sweden	UNSPECIFIED
Grziwa, S.	Rheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, 50931 Köln, Germany	UNSPECIFIED
Guenther, E	Thüringer Landessternwarte Tautenburg	UNSPECIFIED
Hatzes, A	Thüringer Landessternwarte Tautenburg	UNSPECIFIED
Johnson, M.	Las Cumbres Observatory, Goleta, CA, USA	UNSPECIFIED
Kabath, P.	Astronomical Institute ASCR, Fricova 298, 25165 Ondrejov, Czech Republic	UNSPECIFIED
Knudstrup, E.	Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000, Aarhus C, Denmark	UNSPECIFIED
Korth, J.	Rheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, D-50931 Köln, Germany	UNSPECIFIED
Lewin, P.	The Maury Lewin Astronomical Observatory, Glendora, CA, USA	UNSPECIFIED
Lissauer, Jack J.	NASA Ames Research Center, Moffett Field, CA, USA ; Geological Sciences Department, Stanford University, CA, USA	UNSPECIFIED
Lovis, C.	Geneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290, Versoix, Switzerland	UNSPECIFIED
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, Spain	UNSPECIFIED
Melo, C.	European Souther Observatory, Vitacura, Santiago, Chile	UNSPECIFIED
Morgan, E. H.	Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA	UNSPECIFIED
Morris, Robert	NASA Ames Research Center, Moffett Field, CA 94035, USA; SETI Institute, 189 Bernardo Ave., Suite 200, Mountain View, CA 94043, USA	UNSPECIFIED
Mayor, M	Observatoire de Geneve	UNSPECIFIED
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, UK	UNSPECIFIED
Palle, E.	Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain \| Departamento de Astrofisica, Universidad de La Laguna, 38206 La Laguna, Spain	UNSPECIFIED
Pepe, F	Observatoire de Geneve	UNSPECIFIED
Persson, C.	Department of Earth and Space Sciences, Chalmers University of Technology, Onsala Space Observatory, SE-439 92 Onsala, Sweden	UNSPECIFIED
Quinn, S. N.	Harvard-Smithsonian Center for Astrophysics, 60 Garden St, Cambridge, MA 02138, USA	UNSPECIFIED
Rauer, Heike	heike.rauer (at) dlr.de	https://orcid.org/0000-0002-6510-1828
Redfield, S.	Astronomy Department and Van Vleck Observatory, Wesleyan University, Middletown, CT, 06459, USA	UNSPECIFIED
Schlieder, Joshua	NASA Goddard Space Flight Center, 8800 Greenbelt Road, MD, USA	UNSPECIFIED
Segransan, D	Observatoire de Geneve	UNSPECIFIED
Serrano, L.M.	Dipartimento di Fisica, Università degli Studi di Torino, via PietroGiuria 1, I-10125, Torino, Italy	https://orcid.org/0000-0001-9211-3691
Smith, Jeffrey C.	SETI Institute/NASA Ames Research Center, Moffett Field, CA, 94035, USA	UNSPECIFIED
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 Republic	UNSPECIFIED
Twicken, J.D.	NASA Ames Research Center, Moffett Field, CA 94035, USA; SETI Institute, Mountain View, CA 94043, USA	UNSPECIFIED
Udry, S	Observatoire de Genève	UNSPECIFIED
Van Eylen, V.	Mullard Space Science Laboratory, University College London,Holmbury St Mary, Dorking, Surrey RH5 6NT, UK	UNSPECIFIED
Vezie, Michael	Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USA	UNSPECIFIED

Date:

3 December 2021

Journal or Publication Title:

Science

Refereed publication:

Yes

Open Access:

Gold Open Access:

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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