Judith Korth
Postdoc
A resonant sextuplet of sub-Neptunes transiting the bright star HD 110067
Author
Summary, in English
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 stars 1,2. However, their composition, formation and evolution remain poorly understood 3. 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. © 2023, The Author(s), under exclusive licence to Springer Nature Limited.
Department/s
- Mathematics (Faculty of Sciences)
- eSSENCE: The e-Science Collaboration
- Lund Observatory - Has been reorganised
- Astrophysics
Publishing year
2023
Language
English
Pages
932-937
Publication/Series
Nature
Volume
623
Issue
7989
Document type
Journal article
Publisher
Nature Publishing Group
Topic
- Astronomy, Astrophysics and Cosmology
Keywords
- hydrogen
- adult
- article
- astronomy
- bulk density
- diagnosis
- human
- ORBIT score
- prediction
- sun
Status
Published
ISBN/ISSN/Other
- ISSN: 0028-0836