Luque, R; Osborn, H P; Leleu, A; Pallé, E; Bonfanti, A; Barragán, O; Wilson, T G; Broeg, C; Cameron, A Collier; Lendl, M; Maxted, P F L; Alibert, Y; Gandolfi, D; Delisle, J-B; Hooton, M J; Egger, J A; Nowak, G; Lafarga, M; Rapetti, D; Twicken, J D; ... (2023). A resonant sextuplet of sub-Neptunes transiting the bright star HD 110067. Nature, 623(7989), pp. 932-937. Springer Nature 10.1038/s41586-023-06692-3
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Planets with radii between that of the Earth and Neptune (hereafter referred to as 'sub-Neptunes') are found in close-in orbits around more than half of all Sun-like stars1,2. However, their composition, formation and evolution remain poorly understood3. The study of multiplanetary systems offers an opportunity to investigate the outcomes of planet formation and evolution while controlling for initial conditions and environment. Those in resonance (with their orbital periods related by a ratio of small integers) are particularly valuable because they imply a system architecture practically unchanged since its birth. Here we present the observations of six transiting planets around the bright nearby star HD 110067. We find that the planets follow a chain of resonant orbits. A dynamical study of the innermost planet triplet allowed the prediction and later confirmation of the orbits of the rest of the planets in the system. The six planets are found to be sub-Neptunes with radii ranging from 1.94R⊕ to 2.85R⊕. Three of the planets have measured masses, yielding low bulk densities that suggest the presence of large hydrogen-dominated atmospheres.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences 08 Faculty of Science > Physics Institute 10 Strategic Research Centers > Center for Space and Habitability (CSH) 08 Faculty of Science > Physics Institute > NCCR PlanetS |
UniBE Contributor: |
Osborn, Hugh Patrick, Leleu, Adrien Sebastien, Broeg, Christopher, Alibert, Yann Daniel Pierre, Egger, Jo Ann, Beck, Thomas, Benz, Willy, Demory, Brice-Olivier Denys, Fortier, A., Mordasini, Christoph, Schanche, Nicole Elizabeth, Simon, Attila, Thomas, Nicolas |
Subjects: |
500 Science > 520 Astronomy 600 Technology > 620 Engineering 500 Science > 530 Physics |
ISSN: |
1476-4687 |
Publisher: |
Springer Nature |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
30 Nov 2023 16:47 |
Last Modified: |
30 Nov 2023 16:55 |
Publisher DOI: |
10.1038/s41586-023-06692-3 |
PubMed ID: |
38030780 |
BORIS DOI: |
10.48350/189653 |
URI: |
https://boris.unibe.ch/id/eprint/189653 |
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