GJ 367b: A dense, ultrashort-period sub-Earth planet transiting a nearby red dwarf star
Artikel i vetenskaplig tidskrift, 2021
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.
Författare
K. W.F. Lam
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Technische Universität Berlin
Szilárd Csizmadia
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
N. Astudillo-Defru
Universidad Catolica de la Santisima Concepcion
X. Bonfils
Université Grenoble Alpes
D. Gandolfi
Universita degli Studi di Torino
Sebastiano Padovan
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
European Organisation for the Exploitation of Meteorological Satellites
M. Esposito
Thüringer Landessternwarte Tautenburg
Coel Hellier
Keele University
T. Hirano
National Institutes of Natural Sciences
Tokyo Institute of Technology
J.H. Livingston
University of Tokyo
F. Murgas
Universidad de la Laguna
Instituto de Astrofísica de Canarias
Alexis M. S. Smith
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Karen A. Collins
Harvard-Smithsonian Center for Astrophysics
S. Mathur
Universidad de la Laguna
Instituto de Astrofísica de Canarias
R. A. García
Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA)
Université Paris-Saclay
S.B. Howell
NASA Ames Research Center
N. C. Santos
Universidade do Porto
Fei Dai
California Institute of Technology (Caltech)
George R. Ricker
Massachusetts Institute of Technology (MIT)
Roland K. Vanderspek
Massachusetts Institute of Technology (MIT)
D. W. Latham
Harvard-Smithsonian Center for Astrophysics
S. Seager
Massachusetts Institute of Technology (MIT)
J. N. Winn
Princeton University
Jon M. Jenkins
NASA Ames Research Center
Simon Albrecht
Aarhus Universitet
J. M. Almenara
Université Grenoble Alpes
E. Artigau
Université Grenoble Alpes
O. Barragán
University of Oxford
F. Bouchy
Université de Genève
J. Cabrera
Université Grenoble Alpes
D. Charbonneau
Harvard-Smithsonian Center for Astrophysics
Priyanka Chaturvedi
Thüringer Landessternwarte Tautenburg
Alexander Chaushev
Technische Universität Berlin
Jessie L. Christiansen
California Institute of Technology (Caltech)
William D. Cochran
The University of Texas at Austin
José R. de Meideiros
Universidade Federal do Rio Grande do Norte
X. Delfosse
Université Grenoble Alpes
R. F. Diaz
Escuela de Economía y Negocios
René Doyon
Université de Montréal
P. Eigmüller
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
P. Figueira
European Southern Observatory Santiago
Universidade do Porto
T. Forveille
Université Grenoble Alpes
Malcolm Fridlund
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
Universiteit Leiden
G. Gaisné
Université Grenoble Alpes
E. Goffo
Thüringer Landessternwarte Tautenburg
Universita degli Studi di Torino
Iskra Georgieva
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
S. Grziwa
Universität zu Köln
E. W. Guenther
Thüringer Landessternwarte Tautenburg
A. Hatzes
Thüringer Landessternwarte Tautenburg
M.C. Johnson
Las Cumbres Observatory Global Telescope Network
Petr Kabath
Academy of Sciences of the Czech Republic v.v.i
E. Knudstrup
Aarhus Universitet
Judith Korth
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
Universität zu Köln
Pablo Lewin
Maury Lewin Astronomical Observatory
Jack J. Lissauer
NASA Ames Research Center
Stanford University
C. Lovis
Université de Genève
R. Luque
Universidad de la Laguna
Instituto de Astrofísica de Canarias
C. Melo
European Southern Observatory Santiago
Edward H. Morgan
Massachusetts Institute of Technology (MIT)
Robert Morris
NASA Ames Research Center
Search for Extraterrestrial Intelligence Institute
Michel Mayor
Université de Genève
Norio Narita
Astrobiology Center, Japan
University of Tokyo
Japan Science and Technology Agency
Instituto de Astrofísica de Canarias
H. L.M. Osborne
University College London (UCL)
Enric Palle
Instituto de Astrofísica de Canarias
Universidad de la Laguna
Francesco Pepe
Université de Genève
Carina Persson
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
Samuel N. Quinn
Harvard-Smithsonian Center for Astrophysics
H. Rauer
Technische Universität Berlin
Freie Universität Berlin
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
S. Redfield
Wesleyan University
Joshua E. Schlieder
NASA Goddard Space Flight Center
D. Segransan
Université de Genève
L. M. Serrano
Universita degli Studi di Torino
Jeffrey C. Smith
Search for Extraterrestrial Intelligence Institute
NASA Ames Research Center
J. Šubjak
Czech Academy of Sciences
Univerzita Karlova
J. D. Twicken
Search for Extraterrestrial Intelligence Institute
NASA Ames Research Center
S. Udry
Université de Genève
Vincent Van Eylen
University College London (UCL)
Michael L. Vezie
Massachusetts Institute of Technology (MIT)
Science
0036-8075 (ISSN) 1095-9203 (eISSN)
Vol. 374 6572 1271-1275Ämneskategorier
Subatomär fysik
Astronomi, astrofysik och kosmologi
Annan geovetenskap och miljövetenskap
DOI
10.1126/science.aay3253
PubMed
34855492