On the scaling and spacing of extra-solar multi-planet systems

We investigate whether certain extra-solar multi-planet systems simultaneously follow the scaling and spacing rules of the angular-momentum-deficit model. The masses and semi-major axes of exoplanets in ten multi-planet systems are considered. It is found that GJ 667C, HD 215152, HD 40307, and Keple...

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Bibliographic Details
Published in:Astrophysics and space science 2020-12, Vol.365 (12), Article 186
Main Authors: Yeh, Li-Chin, Jiang, Ing-Guey, Gajendran, Sridhar
Format: Article
Language:English
Subjects:
Angular momentum
Astrobiology
Astronomy
Astrophysics
Astrophysics and Astroparticles
Configurations
Cosmology
Extrasolar planets
Momentum
Observations and Techniques
Original Article
Physics
Physics and Astronomy
Planetary systems
Planets
Space Exploration and Astronautics
Space Sciences (including Extraterrestrial Physics
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Summary:We investigate whether certain extra-solar multi-planet systems simultaneously follow the scaling and spacing rules of the angular-momentum-deficit model. The masses and semi-major axes of exoplanets in ten multi-planet systems are considered. It is found that GJ 667C, HD 215152, HD 40307, and Kepler-79 systems are currently close to configurations of the angular-momentum-deficit model. In a gas-poor scenario, GJ 3293, HD 141399, and HD 34445 systems are those which had a configuration of the angular-momentum-deficit model in the past and get scattered away due to post gaseous effects. In addition, no matter in gas-free or gas-poor scenario, 55 Cnc, GJ 876, and WASP-47 systems do not follow the angular-momentum-deficit model. Therefore, our results reveal important formation histories of these multi-planet systems.
ISSN:0004-640X
1572-946X
DOI:10.1007/s10509-020-03899-y