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Chaotic diffusion in the GJ 876 exoplanetary system

Published online by Cambridge University Press:  16 October 2024

Raphael Alves Silva Open the ORCID record for Raphael Alves Silva [Opens in a new window] ,
Cristian Beaugé  and
Sylvio Ferraz-Mello Open the ORCID record for Sylvio Ferraz-Mello [Opens in a new window]
Raphael Alves Silva*
Affiliation:
Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo (Brasil)
Cristian Beaugé
Affiliation:
Universidad Nacional de Córdoba, Observatorio Astronómico - IATE (Argentina)
Sylvio Ferraz-Mello
Affiliation:
Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo (Brasil)
*
email: [email protected]
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Abstract

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This is a study about the dynamical stability of the GJ 876 exoplanetary system. The phase space of initial conditions (ICs) is characterized using the MEGNO indicator of chaos and the Shannon entropy approach for estimations of diffusivity. The results are compared to analyze correlations between the chaotic layers and the instability timescales. The long-term dynamical behavior of the system is reminiscent of the stable chaos, at least within the system’s lifetime.

Keywords

Shannon entropyplanetary instabilitychaotic diffusionLaplace resonance
Type
Poster Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S382: Complex Planetary Systems II: Latest Methods for an Interdisciplinary Approach , December 2022 , pp. 177 - 179
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

References

Alves Silva, R., Beaugé, C., Ferraz-Mello, S. et al. 2021, A&A, 652, A112.Google Scholar
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