Accès ouvert déclaré
2026
preprint
Gas-depleted planet formation occurred in the four-planet system around the red dwarf LHS 1903
Thomas G. Wilson, Anna M. Simpson, Andrew Collier Cameron, Ryan Nelson Cloutier, Vardan Adibekyan, A. A. John, Yann Alibert, Manu Stalport, Jo Ann Egger, Andrea Bonfanti, Nicolas Billot, P. Guterman, Pierre F. L. Maxted, Attila E. Simon, Sergio G. Sousa, Malcolm Fridlund, Mathias Beck, Anja Bekkelien, Sebastien Salmon, Valerie Van Grootel, Luca Fossati, Alexander James Mustill, Hugh P. Osborn, T. Zingales, Matthew J. Hooton, L. Affer, Suzanne Aigrain, Roi Alonso, Guillem Anglada, A. Antoniadis-Karnavas, T. Bárczy, David Barrado Navascues, S. C. C. Barros, Wolfgang Baumjohann, Thomas D. Beck, Willy Benz, Federico Biondi, Xavier Bonfils, Luca Borsato, Alexis Brandeker, C. Broeg, Lars A. Buchhave, Maximilian Buder, Juan A. Cabrera, S Carrazco Gaxiola, David Charbonneau, Sebastien Charnoz, David R. Ciardi, Karen A. Collins, Kevin I. Collins, Rosario Cosentino, Szilárd Csizmadia, Patricio E. Cubillos, Shweta Dalal, M. Damasso, James R. A. Davenport, Melvyn B. Davies, Magali Deleuil, Laetitia Delrez, Olivier D. S. Demangeon, Brice-Olivier Demory, Victoria DiTomasso, Diana Dragomir, Courtney D. Dressing, Xavier Dumusque, David Ehrenreich, Anders Erikson, Emma Esparza-Borges, A. Fortier, Izuru Fukuda, Akihiko Fukui, Davide Gandolfi, Adriano Ghedina, Steven Giacalone, Holden Gill, Michael Gillon, Yilen Gomez Maqueo Chew, Manuel Güdel, Pere Guerra, Maximilian N. Gunther, N. Hara, A. Harutyunyan, Yuya Hayashi, Raphaelle D. Haywood, Rae Holcomb, Keith Horne, Sergio Hoyer, Chelsea X. Huang, Masahiro Ikoma, Kate G. Isaak, James A. G. Jackman, Jon M. Jenkins, Eric L. N. Jensen, Daniel Jontof-Hutter, Yugo Kawai, László Kiss, Ben S Lakeland, J. Laskar, David W. Latham, Alain Lecavelier des Etangs, Adrien Leleu, Monika Lendl, Jerome de Leon, Florian Lienhard, Mercedes Lopez-Morales, Christophe Lovis, Michael B. Lund, Rafael Luque, D. Magrin, Luca Malavolta, Aldo F Martinez Fiorenzano, Andrew W. Mayo, Michel Mayor, Christoph Mordasini, Annelies Mortier, Felipe Murgas, Norio Narita, Valerio Nascimbeni, Belinda A. Nicholson, Göran Olofsson, Roland Ottensamer, Isabella Pagano, Larissa Palethorpe, Enric Palle, Hannu Parviainen, Marco Pedani, Francesco A. Pepe, Gisbert Peter, M. Pinamonti, Giampaolo Piotto, Don Pollacco, Ennio Poretti, Didier Queloz, Samuel N. Quinn, Roberto Ragazzoni, Nicola Rando, David Rapetti, F. Ratti, Heike Rauer, Federica Rescigno, Ignasi Ribas, K. Rice, George R. Ricker, Paul Robertson, Thierry De Roche, Laurence Sabin, Nuno C. Santos, Dimitar D. Sasselov, Arjun B. Savel, Gaetano Scandariato, N. Schanche, U. Schroffenegger, Richard P. Schwarz, Sara Seager, Ramotholo Sefako, Damien Segransan, Avi Shporer, A. M. Silva, Alexis M S Smith, Alessandro Sozzetti, Manfred Steller, Gyula M. Szabo, Motohide Tamura, Nicolas Thomas, A. Tuson, Stephane Udry, Andrew Vanderburg, Roland K. Vanderspek, Julia Venturini, Francesco Verrecchia, Nicholas A. Walton, Christopher A. Watson, Robert D. Wells, Joshua N. Winn, Roberto Zambelli, Carl Ziegler
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Le résumé fourni par la source
Small exoplanet radii show two populations, referred to as super-Earths and sub-Neptunes, separated by a gap known as the radius valley. This may be produced by the removal of atmospheres due to stellar or internal heating, or lack of an initial envelope. We us transit photometry and radial velocity measurements to detect and characterize four planets orbiting LHS 1903, a red dwarf (M-dwarf) star in the Milky Way's thick disk. The planets have orbital periods between 2.2 and 29.3 days, and span the radius valley within a single planetary system. The derived densities indicate that LHS 1903 b is rocky, while LHS 1903 c and LHS 1903 d have extended atmospheres. Although the most distant planet from the host star, LHS 1903 e, has no gaseous envelope, indicating it formed from gas-depleted material.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
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Les sujets associés
Stellar, planetary, and galactic studiesAstronomy and Astrophysical ResearchEducational Leadership and Practices