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A remnant planetary core in the hot-Neptune desert
Armstrong, David J. and Lopez, Théo A. and Adibekyan, Vardan and Booth, Richard A. and Bryant, Edward M. and Collins, Karen A. and Deleuil, Magali and Emsenhuber, Alexandre and Huang, Chelsea X. and King, George W. and Lillo-Box, Jorge and Lissauer, Jack J. and Matthews, Elisabeth and Mousis, Olivier and Nielsen, Louise D. and Osborn, H and Otegi, Jon and Santos, Nuno C. and Sousa, Sérgio G. and Stassun, Keivan G. and Veras, Dimitri and Ziegler, Carl and Acton, Jack S. and Almenara, Jose M. and Anderson, David R. and Barrado, David and Barros, Susana C.C. and Bayliss, Daniel and Belardi, Claudia and Bouchy, Francois and Briceño, César and Brogi, Matteo and Brown, David and Burleigh, Matthew R. and Casewell, Sarah L. and Chaushev, Alexander and Ciardi, David R. and Collins, Kevin I. and Colón, Knicole D. and Cooke, Benjamin F. and Crossfield, Ian J.M. and Díaz, Rodrigo F. and Mena, Elisa Delgado and Demangeon, Olivier D.S. and Dorn, Caroline and Dumusque, Xavier and Eigmüller, Philipp and Fausnaugh, Michael and Figueira, Pedro and Gan, Tianjun and Gandhi, Siddharth and Gill, Samuel and Gonzales, Erica J. and Goad, Michael R. and Günther, Maximilian N. and Helled, Ravit and Hojjatpanah, Saeed and Howell, Steve B. and Jackman, James A. G. and Jenkins, James S. and Jenkins, Jon M. and Jensen, Eric L.N. and Kennedy, Grant M. and Latham, David W. and Law, Nicholas and Lendl, Monika and Lozovsky, Michael and Mann, Andrew W. and Moyano, Maximiliano and McCormac, James and Meru, Farzana and Mordasini, Christoph and Osborn, Ares and Pollacco, Don and Queloz, Didier and Raynard, Liam and Ricker, George R. and Rowden, Pamela and Santerne, Alexandre and Schlieder, Joshua E. and Seager, Sara and Sha, Lizhou and Tan, Thiam-Guan and Tilbrook, Rosanna H. and Ting, Eric and Udry, Stephane and Vanderspek, Roland and Watson, Christopher A. and West, Richard G. and Wilson, Paul A. and Winn, Joshua N. and Wheatley, Peter J. and Villasenor, Jesus Noel and Vines, Jose I. and Zhan, Zhuchang
(2020)
A remnant planetary core in the hot-Neptune desert.
Nature, 583 (7814), pp. 39-42.
Nature Publishing Group.
doi: 10.1038/s41586-020-2421-7.
ISSN 0028-0836.
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Official URL: https://www.nature.com/articles/s41586-020-2421-7 AbstractThe interiors of giant planets remain poorly understood. Even for the planets in the Solar System, difficulties in observation lead to large uncertainties in the properties of planetary cores. Exoplanets that have undergone rare evolutionary processes provide a route to understanding planetary interiors. Planets found in and near the typically barren hot-Neptune `desert'1,2 (a region in mass-radius space that contains few planets) have proved to be particularly valuable in this regard. These planets include HD149026b3, which is thought to have an unusually massive core, and recent discoveries such as LTT9779b4 and NGTS-4b5, on which photoevaporation has removed a substantial part of their outer atmospheres. Here we report observations of the planet TOI-849b, which has a radius smaller than Neptune's but an anomalously large mass of 39.1 -2.6+2.7? Earth masses and a density of 5.2 -0.8+0.7? grams per cubic centimetre, similar to Earth's. Interior-structure models suggest that any gaseous envelope of pure hydrogen and helium consists of no more than 3.9-0.9+0.8? per cent of the total planetary mass. The planet could have been a gas giant before undergoing extreme mass loss via thermal self-disruption or giant planet collisions, or it could have avoided substantial gas accretion, perhaps through gap opening or late formation6. Although photoevaporation rates cannot account for the mass loss required to reduce a Jupiter-like gas giant, they can remove a small (a few Earth masses) hydrogen and helium envelope on timescales of several billion years, implying that any remaining atmosphere on TOI-849b is likely to be enriched by water or other volatiles from the planetary interior. We conclude that TOI-849b is the remnant core of a giant planet. | Item URL in elib: | https://elib.dlr.de/136667/ |
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| Document Type: | Article |
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| Title: | A remnant planetary core in the hot-Neptune desert |
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| Authors: | | Authors | Institution or Email of Authors | Author's ORCID iD |
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| Armstrong, David J. | Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK | https://orcid.org/0000-0002-5080-4117 | | Lopez, Théo A. | Aix-Marseille Université, CNRS, CNES, LAM, Marseilles, France | UNSPECIFIED | | Adibekyan, Vardan | Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Porto, Portugal | UNSPECIFIED | | Booth, Richard A. | Institute of Astronomy, University of Cambridge, Cambridge, UK | UNSPECIFIED | | Bryant, Edward M. | Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK | UNSPECIFIED | | Collins, Karen A. | Center for Astrophysics, Harvard and Smithsonian, Cambridge, MA, USA | UNSPECIFIED | | Deleuil, Magali | Aix-Marseille Université, CNRS, CNES, LAM, Marseilles, France | UNSPECIFIED | | Emsenhuber, Alexandre | Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA; Physikalisches Institut, University of Bern, Bern, Switzerland | UNSPECIFIED | | Huang, Chelsea X. | Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USA | UNSPECIFIED | | King, George W. | Centre for Exoplanets and Habitability, University of Warwick, Coventry, UK; Department of Physics, University of Warwick, Coventry, UK | UNSPECIFIED | | Lillo-Box, Jorge | Departamento de Astrofísica, Centro de Astrobiología (CSIC-INTA), Madrid, Spain | UNSPECIFIED | | Lissauer, Jack J. | NASA Ames Research Center, Moffett Field, CA, USA | UNSPECIFIED | | Matthews, Elisabeth | Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USA | UNSPECIFIED | | Mousis, Olivier | Aix-Marseille Université, CNRS, CNES, LAM, Marseilles, France | UNSPECIFIED | | Nielsen, Louise D. | Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, CH-1290 Sauverny, Switzerland | UNSPECIFIED | | Osborn, H | Aix-Marseille Université, CNRS, CNES, LAM, Marseilles, France | UNSPECIFIED | | Otegi, Jon | Observatoire Astronomique de l'Université de Genéve, Versoix, Switzerland; Institute for Computational Science, University of Zurich, Zurich, Switzerland | UNSPECIFIED | | 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, Portugal | UNSPECIFIED | | Sousa, Sérgio G. | Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Porto, Portugal | UNSPECIFIED | | Stassun, Keivan G. | Department of Physics and Astronomy, Vanderbilt University, Nashville, TN, USA; Department of Physics, Fisk University, Nashville, TN, USA | UNSPECIFIED | | Veras, Dimitri | Centre for Exoplanets and Habitability, University of Warwick, Coventry, UK; Department of Physics, University of Warwick, Coventry, UK | UNSPECIFIED | | Ziegler, Carl | Dunlap Institute for Astronomy and Astrophysics, University of Toronto, Toronto, Ontario, Canada | UNSPECIFIED | | Acton, Jack S. | School of Physics and Astronomy, University of Leicester, Leicester, UK | UNSPECIFIED | | Almenara, Jose M. | Université Grenoble Alpes, CNRS, IPAG, Grenoble, France | UNSPECIFIED | | Anderson, David R. | Centre for Exoplanets and Habitability, University of Warwick, Coventry, UK; Department of Physics, University of Warwick, Coventry, UK | UNSPECIFIED | | Barrado, David | Departamento de Astrofísica, Centro de Astrobiología (CSIC-INTA), Madrid, Spain | UNSPECIFIED | | Barros, Susana C.C. | Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Porto, Portugal | UNSPECIFIED | | Bayliss, Daniel | Centre for Exoplanets and Habitability, University of Warwick, Coventry, UK; Department of Physics, University of Warwick, Coventry, UK | UNSPECIFIED | | Belardi, Claudia | Department of Physics and Astronomy, University of Leicester , University Road, Leicester LE1 7RH, UK | UNSPECIFIED | | Bouchy, Francois | Geneva Observatory, University of Geneva, Chemin des Mailettes 51, CH-1290 Versoix, Switzerland | UNSPECIFIED | | Briceño, César | Cerro Tololo Inter-American Observatory, La Serena, Chile | UNSPECIFIED | | Brogi, Matteo | Centre for Exoplanets and Habitability, University of Warwick, Coventry, UK; Department of Physics, University of Warwick, Coventry, UK; INAF Osservatorio Astrofisico di Torino, Pino Torinese, Italy | UNSPECIFIED | | Brown, David | Centre for Exoplanets and Habitability, University of Warwick, Coventry, UK; Department of Physics, University of Warwick, Coventry, UK | UNSPECIFIED | | Burleigh, Matthew R. | Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK | UNSPECIFIED | | Casewell, Sarah L. | Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK | UNSPECIFIED | | Chaushev, Alexander | Center for Astronomy and Astrophysics, TU Berlin, Hardenbergstr. 36, 10623 Berlin, GermanyCenter for Astronomy and Astrophysics, TU Berlin, Germany | UNSPECIFIED | | Ciardi, David R. | Caltech/IPAC-NASA Exoplanet Science Institute, Pasadena, CA, USA | UNSPECIFIED | | Collins, Kevin I. | George Mason University, Fairfax, VA, USA | UNSPECIFIED | | Colón, Knicole D. | NASA Goddard Space Flight Center, Exoplanets and Stellar Astrophysics Laboratory (Code 667), Greenbelt, MD, USA | UNSPECIFIED | | Cooke, Benjamin F. | Centre for Exoplanets and Habitability, University of Warwick, Coventry, UK; Department of Physics, University of Warwick, Coventry, UK | UNSPECIFIED | | Crossfield, Ian J.M. | Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USA | UNSPECIFIED | | 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 Studies | UNSPECIFIED | | Mena, Elisa Delgado | Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Porto, Portugal | UNSPECIFIED | | Demangeon, Olivier D.S. | Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Porto, Portugal | UNSPECIFIED | | Dorn, Caroline | Institute for Computational Science, University of Zurich, Zurich, Switzerland | UNSPECIFIED | | Dumusque, Xavier | Observatoire Astronomique de l'Université de Genéve, Versoix, Switzerland | UNSPECIFIED | | Eigmüller, Philipp | UNSPECIFIED | https://orcid.org/0000-0003-4096-0594 | | Fausnaugh, Michael | Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USA | UNSPECIFIED | | Figueira, Pedro | Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Porto, Portugal; European Southern Observatory, Santiago, Chile | UNSPECIFIED | | Gan, Tianjun | Department of Astronomy and Tsinghua Centre for Astrophysics, Tsinghua University, Beijing, China | UNSPECIFIED | | Gandhi, Siddharth | Department of Physics, University of Warwick, Coventry, UK | UNSPECIFIED | | Gill, Samuel | Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK | UNSPECIFIED | | Gonzales, Erica J. | Department of Astronomy and Astrophysics, University of California at Santa Cruz, Santa Cruz, CA, USA | UNSPECIFIED | | Goad, Michael R. | Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK | UNSPECIFIED | | Günther, Maximilian N. | Astrophysics Group, Cavendish Laboratory, J. J. Thomson Avenue, Cambridge CB3 0HE, UK; Department of Physics, and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA | UNSPECIFIED | | Helled, Ravit | Institute for Computational Science, University of Zurich, Zurich, Switzerland | UNSPECIFIED | | Hojjatpanah, Saeed | 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, Portugal | UNSPECIFIED | | Howell, Steve B. | NASA Ames Research Center, Moffett Field, CA, USA | UNSPECIFIED | | Jackman, James A. G. | Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK | UNSPECIFIED | | Jenkins, James S. | Departamento de Astronomia, Universidad de Chile, Casilla 36-D, Santiago, Chile; Centro de Astrofísica y Tecnologías Afines (CATA), Casilla 36-D, Santiago, Chile | UNSPECIFIED | | Jenkins, Jon M. | NASA Ames Research Center, Moffett Field, CA, USA | UNSPECIFIED | | Jensen, Eric L.N. | Department of Physics and Astronomy, Swarthmore College, Swarthmore, PA, USA | UNSPECIFIED | | Kennedy, Grant M. | Centre for Exoplanets and Habitability, University of Warwick, Coventry, UK; Department of Physics, University of Warwick, Coventry, UK | UNSPECIFIED | | Latham, David W. | Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA | UNSPECIFIED | | Law, Nicholas | Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA | UNSPECIFIED | | Lendl, Monika | Observatoire Astronomique de l'Université de Genéve, Versoix, Switzerland; Space Research Institute, Austrian Academy of Sciences, Graz, Austria | UNSPECIFIED | | Lozovsky, Michael | Institute for Computational Science, University of Zurich, Zurich, Switzerland | UNSPECIFIED | | Mann, Andrew W. | Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA | UNSPECIFIED | | Moyano, Maximiliano | Instituto de Astronomía, Universidad Católica del Norte, Angamos 0610, 1270709 Antofagasta, Chile | UNSPECIFIED | | McCormac, James | Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK | UNSPECIFIED | | Meru, Farzana | Centre for Exoplanets and Habitability, University of Warwick, Coventry, UK; Department of Physics, University of Warwick, Coventry, UK | UNSPECIFIED | | Mordasini, Christoph | Physikalisches Institut, University of Bern, Bern, Switzerland | UNSPECIFIED | | Osborn, Ares | Centre for Exoplanets and Habitability, University of Warwick, Coventry, UK; Department of Physics, University of Warwick, Coventry, UK | UNSPECIFIED | | Pollacco, Don | Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK | UNSPECIFIED | | Queloz, Didier | Astrophysics Group, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge CB3 0HE, UK | UNSPECIFIED | | Raynard, Liam | Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK | https://orcid.org/0000-0001-6472-9122 | | Ricker, George R. | Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USA | UNSPECIFIED | | Rowden, Pamela | School of Physical Sciences, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK | UNSPECIFIED | | Santerne, Alexandre | Aix-Marseille Université, CNRS, CNES, LAM, Marseilles, France | UNSPECIFIED | | Schlieder, Joshua E. | NASA Goddard Space Flight Center, Exoplanets and Stellar Astrophysics Laboratory (Code 667), Greenbelt, MD, USA | UNSPECIFIED | | Seager, Sara | Department 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; D | UNSPECIFIED | | Sha, Lizhou | Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USA | UNSPECIFIED | | Tan, Thiam-Guan | Perth Exoplanet Survey Telescope, Perth, Western Australia, Australia | UNSPECIFIED | | Tilbrook, Rosanna H. | Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK | UNSPECIFIED | | Ting, Eric | NASA Ames Research Center, Moffett Field, CA, USA | UNSPECIFIED | | Udry, Stephane | Observatoire Astronomique de l'Université de Genève, 51 Ch. des Maillettes, CH-1290 Versoix, Switzerland | UNSPECIFIED | | Vanderspek, Roland | Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USA | UNSPECIFIED | | Watson, Christopher A. | Astrophysics Research Centre, Queen's University Belfast, 1 University Road, Belfast BT7 1NN, UK | UNSPECIFIED | | West, Richard G. | Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK | UNSPECIFIED | | Wilson, Paul A. | Centre for Exoplanets and Habitability, University of Warwick, Coventry, UK; Department of Physics, University of Warwick, Coventry, UK | UNSPECIFIED | | Winn, Joshua N. | Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544, USA | UNSPECIFIED | | Wheatley, Peter J. | Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK | UNSPECIFIED | | Villasenor, Jesus Noel | Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USA | UNSPECIFIED | | Vines, Jose I. | Departamento de Astronomía, Universidad de Chile, Casilla 36-D, 7591245, Santiago, Chile | UNSPECIFIED | | Zhan, Zhuchang | Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA | UNSPECIFIED |
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| Date: | 2020 |
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| Journal or Publication Title: | Nature |
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| Refereed publication: | Yes |
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| Open Access: | Yes |
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| Gold Open Access: | No |
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| In SCOPUS: | Yes |
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| In ISI Web of Science: | Yes |
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| Volume: | 583 |
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| DOI: | 10.1038/s41586-020-2421-7 |
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| Page Range: | pp. 39-42 |
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| Publisher: | Nature Publishing Group |
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| ISSN: | 0028-0836 |
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| Status: | Published |
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| Keywords: | Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Solar and Stellar Astrophysics |
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| HGF - Research field: | Aeronautics, Space and Transport |
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| HGF - Program: | Space |
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| HGF - Program Themes: | Space Exploration |
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| DLR - Research area: | Raumfahrt |
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| DLR - Program: | R EW - Space Exploration |
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| DLR - Research theme (Project): | R - Project PLATO (old) |
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Location: |
Berlin-Adlershof
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| Institutes and Institutions: | Institute of Planetary Research > Extrasolar Planets and Atmospheres |
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| Deposited By: |
Eigmüller, Dr. Philipp
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| Deposited On: | 04 Nov 2020 07:57 |
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| Last Modified: | 04 Nov 2020 07:58 |
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