The Planetary Science Journal (Jan 2025)
History and Habitability of the LP 890-9 Planetary System
- Rory Barnes,
- Laura N. R. do Amaral,
- Jessica Birky,
- Ludmila Carone,
- Peter Driscoll,
- Joseph R. Livesey,
- David Graham,
- Juliette Becker,
- Kaiming Cui,
- Martin Schlecker,
- Rodolfo Garcia,
- Megan Gialluca,
- Arthur Adams,
- MD Redyan Ahmed,
- Paul Bonney,
- Wynter Broussard,
- Chetan Chawla,
- Mario Damasso,
- William C. Danchi,
- Russell Deitrick,
- Elsa Ducrot,
- Emeline F. Fromont,
- Brandt A. L. Gaches,
- Sakshi Gupta,
- Michelle L. Hill,
- James A. G. Jackman,
- Estelle M. Janin,
- Mikołaj Karawacki,
- Matheus Daniel Koren,
- Roberto La Greca,
- Michaela Leung,
- Arturo Miranda-Rosete,
- Michael Kent A. Olohoy,
- Cecelia Ngo,
- Daria Paul,
- Chandan Kumar Sahu,
- Debajyoti Basu Sarkar,
- Mohammad Afzal Shadab,
- Edward W. Schwieterman,
- Melissa Sedler,
- Katie Texeira,
- Allona Vazan,
- Karen N. Delgado Vega,
- Rohit Vijayakumar,
- Jonathan T. Wojack
Affiliations
- Rory Barnes
- ORCiD
- Astronomy Department, University of Washington , Box 315180, Seattle, WA 98195, USA ; [email protected]
- Laura N. R. do Amaral
- ORCiD
- Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México , Cto. Exterior S/N, C.U., Coyoacán, 04510 Ciudad de México, CDMX, Mexico; School of Earth and Space Exploration, Arizona State University , 781 Terrace Mall, Tempe, AZ 85287, USA; Consortium on Habitability and Atmospheres of M-dwarf Planets (CHAMPs) , Laurel, MD, USA; NASA Virtual Planetary Laboratory Lead Team , USA
- Jessica Birky
- ORCiD
- Astronomy Department, University of Washington , Box 315180, Seattle, WA 98195, USA ; [email protected]
- Ludmila Carone
- ORCiD
- Space Research Institute, Austrian Academy of Sciences , Schmiedlstrasse 6, A-8042 Graz, Austria; Centre for Exoplanet Science, School of Physics & Astronomy, University of St Andrews , North Haugh, St Andrews, KY169SS, UK
- Peter Driscoll
- Earth and Planets Laboratory, Carnegie Institution for Science , 5241 Broad Branch Road, Washington, DC 20015, USA
- Joseph R. Livesey
- ORCiD
- Astronomy Department, University of Washington , Box 315180, Seattle, WA 98195, USA ; [email protected]; Department of Astronomy, University of Wisconsin–Madison , 475 N. Charter Street, Madison, WI 53706, USA
- David Graham
- Institut für Theoretische Astrophysik (ITA) , Zentrum für Astronomie (ZAH), Universität Heidelberg, Albert-Ueberle-Str.2 69120 Heidelberg, Germany
- Juliette Becker
- ORCiD
- Department of Astronomy, University of Wisconsin–Madison , 475 N. Charter Street, Madison, WI 53706, USA; Division of Geological and Planetary Sciences, California Institute of Technology , Pasadena, CA 91125, USA
- Kaiming Cui
- ORCiD
- Tsung-Dao Lee Institute, Shanghai Jiao Tong University , 800 Dongchuan Road, Shanghai 200240, People’s Republic of China
- Martin Schlecker
- ORCiD
- Steward Observatory and Department of Astronomy, The University of Arizona , Tucson, AZ 85721, USA
- Rodolfo Garcia
- Astronomy Department, University of Washington , Box 315180, Seattle, WA 98195, USA ; [email protected]
- Megan Gialluca
- ORCiD
- Astronomy Department, University of Washington , Box 315180, Seattle, WA 98195, USA ; [email protected]
- Arthur Adams
- ORCiD
- Department of Earth and Planetary Sciences, University of California , Riverside, CA 92521, USA
- MD Redyan Ahmed
- ORCiD
- Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata , West Bengal 741246, India
- Paul Bonney
- ORCiD
- Department of Physics, University of Arkansas , 825 W. Dickson Street, Fayetteville, Arkansas 72701, USA
- Wynter Broussard
- ORCiD
- Department of Earth and Planetary Sciences, University of California , Riverside, CA 92521, USA
- Chetan Chawla
- ORCiD
- Independent Researcher, New Delhi 110027, India
- Mario Damasso
- ORCiD
- INAF—Osservatorio Astrofisico di Torino , Via Osservatorio 20, I-0025, Pino Torinese (TO), Italy
- William C. Danchi
- ORCiD
- NASA Goddard Space Flight Center , Exoplanets and Stellar Astrophysics Laboratory, Greenbelt, MD 20771, USA
- Russell Deitrick
- ORCiD
- School of Earth and Ocean Sciences, University of Victoria , Victoria, British Columbia, Canada
- Elsa Ducrot
- ORCiD
- AIM , CEA, CNRS, Université Paris-Saclay, Université de Paris, F-91191 Gif-sur-Yvette, France
- Emeline F. Fromont
- ORCiD
- Department of Astronomy, University of Maryland , College Park, MD 20742, USA
- Brandt A. L. Gaches
- ORCiD
- Department of Space, Earth & Environment, Chalmers University of Technology , SE-412 96 Gothenburg, Sweden; Center for Planetary Systems Habitability, The University of Texas at Austin , Austin, TX 78712, USA
- Sakshi Gupta
- ORCiD
- Center of Excellence in Space Sciences India, Indian Institute of Science Education and Research Kolkata , Mohanpur 741246, India; Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata , Mohanpur 741246, India
- Michelle L. Hill
- ORCiD
- Department of Earth and Planetary Sciences, University of California , Riverside, CA 92521, USA
- James A. G. Jackman
- School of Earth and Space Exploration, Arizona State University , Tempe, AZ 82587, USA
- Estelle M. Janin
- ORCiD
- School of Earth and Space Exploration, Arizona State University , Tempe, AZ 82587, USA
- Mikołaj Karawacki
- ORCiD
- Department of Physics, Astronomy and Applied Informatics, Nicolaus Copernicus University , Toruń, Poland
- Matheus Daniel Koren
- ORCiD
- Instituto de Matemática , Estatística e Física, Universidade Federal do Rio Grande, Rio Grande, RS, Brazil
- Roberto La Greca
- Biology Consultant Freelancer , Lodi CAP 26900, Lombardia, Italy
- Michaela Leung
- ORCiD
- Department of Earth and Planetary Sciences, University of California , Riverside, CA 92521, USA
- Arturo Miranda-Rosete
- ORCiD
- Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México , Cto. Exterior S/N, C.U., Coyoacán, 04510 Ciudad de México, CDMX, Mexico
- Michael Kent A. Olohoy
- ORCiD
- Department of Earth and Space Sciences, Rizal Technological University , Boni Avenue, Mandaluyong, 1550 Metro Manila, Philippines
- Cecelia Ngo
- Department of Physics and Astronomy, University of California , Riverside 92521, USA
- Daria Paul
- ORCiD
- Physikalisches Institut, Universität zu Köln , Zälpicher Straße 77, 50937 Köln, Germany
- Chandan Kumar Sahu
- ORCiD
- National Institute of Science Education and Research Bhubaneswar , Jatni 752050, Odisha, India
- Debajyoti Basu Sarkar
- ORCiD
- Independent Researcher, White Hall, AR 71602, USA
- Mohammad Afzal Shadab
- ORCiD
- Center for Planetary Systems Habitability, The University of Texas at Austin , Austin, TX 78712, USA; Department of Civil and Environmental Engineering, Princeton University , Princeton, NJ 08544, USA; Oden Institute for Computational Engineering and Sciences, The University of Texas at Austin , Austin, TX 78712, USA
- Edward W. Schwieterman
- ORCiD
- Department of Earth and Planetary Sciences, University of California , Riverside, CA 92521, USA
- Melissa Sedler
- Independent Researcher , Phoenix, AZ 85048, USA
- Katie Texeira
- Department of Astronomy, University of Texas at Austin , Austin, TX 78712, USA
- Allona Vazan
- ORCiD
- Astrophysics Research Center (ARCO) , Department of Natural Sciences, The Open University of Israel, Raanana 4353701, Israel
- Karen N. Delgado Vega
- University of Puerto Rico at Arecibo , Puerto Rico, USA
- Rohit Vijayakumar
- ORCiD
- Divecha Center for Climate Change, India Institute of Science , Bengaluru 560012, Karnataka, India
- Jonathan T. Wojack
- ORCiD
- University of Southern Queensland , Toowoomba QLD 4350, Australia
- DOI
- https://doi.org/10.3847/PSJ/ad94dc
- Journal volume & issue
-
Vol. 6,
no. 1
p. 25
Abstract
We present numerous aspects of the evolution of the LP 890-9 (SPECULOOS-2/TOI-4306) planetary system, focusing on the likelihood that planet c can support life. We find that the host star reaches the main sequence in 1 Gyr and that planet c lies close to the inner boundary of the habitable zone. We find the magma ocean stage can last up to 50 Myr, remove eight Earth oceans of water, and leave up to 2000 bars of oxygen in the atmosphere. However, if the planet forms with a hydrogen envelope as small as 0.1 Earth masses, no water will be lost during the star's pre-main-sequence phase from thermal escape processes. We find that the planets are unlikely to be in a 3:1 mean motion resonance and that both planets tidally circularize within 0.5 Gyr when tidal dissipation is held constant. However, if tidal dissipation is a function of mantle temperature and rheology, then we find that planet c's orbit may require more than 7 Gyr to circularize, during which time tidal heating may reach hundreds of terawatts. We thus conclude that the habitability of planet c depends most strongly on the initial volatile content and internal properties, but no data yet preclude the viability of an active biosphere on the planet.
Keywords
