Chaotic diffusion in the Gliese-876 planetary system
Chaotic diffusion is supposed to be responsible for orbital instabilities in planetary systems after the dissipation of the protoplanetary disc, and a natural consequence of irregular motion. In this paper, we show that resonant multiplanetary systems, despite being highly chaotic, not necessarily e...
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2016
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/93566 https://academic.oup.com/mnras/article-abstract/460/1/1094/2608834?redirectedFrom=fulltext https://ri.conicet.gov.ar/handle/11336/37343 |
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I19-R120-10915-93566 |
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dspace |
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Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
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SEDICI (UNLP) |
| language |
Inglés |
| topic |
Astronomía chaos diffusion methods: numerical celestial mechanics planets and satellites: dynamical evolution and stability planets and satellites: formation |
| spellingShingle |
Astronomía chaos diffusion methods: numerical celestial mechanics planets and satellites: dynamical evolution and stability planets and satellites: formation Martí, Javier Guillermo Cincotta, Pablo Miguel Beaugé, Cristian Chaotic diffusion in the Gliese-876 planetary system |
| topic_facet |
Astronomía chaos diffusion methods: numerical celestial mechanics planets and satellites: dynamical evolution and stability planets and satellites: formation |
| description |
Chaotic diffusion is supposed to be responsible for orbital instabilities in planetary systems after the dissipation of the protoplanetary disc, and a natural consequence of irregular motion. In this paper, we show that resonant multiplanetary systems, despite being highly chaotic, not necessarily exhibit significant diffusion in phase space, and may still survive virtually unchanged over time-scales comparable to their age. Using the GJ-876 system as an example, we analyse the chaotic diffusion of the outermost (and less massive) planet. We construct a set of stability maps in the surrounding regions of the Laplace resonance. We numerically integrate ensembles of close initial conditions, compute Poincaŕe maps and estimate the chaotic diffusion present in this system. Our results show that, the Laplace resonance contains two different regions: an inner domain characterized by low chaoticity and slow diffusion, and an outer one displaying larger values of dynamical indicators. In the outer resonant domain, the stochastic borders of the Laplace resonance seem to prevent the complete destruction of the system. We characterize the diffusion for small ensembles along the parameters of the outermost planet. Finally, we perform a stability analysis of the inherent chaotic, albeit stable Laplace resonance, by linking the behaviour of the resonant variables of the configurations to the different sub-structures inside the three-body resonance. |
| format |
Articulo Articulo |
| author |
Martí, Javier Guillermo Cincotta, Pablo Miguel Beaugé, Cristian |
| author_facet |
Martí, Javier Guillermo Cincotta, Pablo Miguel Beaugé, Cristian |
| author_sort |
Martí, Javier Guillermo |
| title |
Chaotic diffusion in the Gliese-876 planetary system |
| title_short |
Chaotic diffusion in the Gliese-876 planetary system |
| title_full |
Chaotic diffusion in the Gliese-876 planetary system |
| title_fullStr |
Chaotic diffusion in the Gliese-876 planetary system |
| title_full_unstemmed |
Chaotic diffusion in the Gliese-876 planetary system |
| title_sort |
chaotic diffusion in the gliese-876 planetary system |
| publishDate |
2016 |
| url |
http://sedici.unlp.edu.ar/handle/10915/93566 https://academic.oup.com/mnras/article-abstract/460/1/1094/2608834?redirectedFrom=fulltext https://ri.conicet.gov.ar/handle/11336/37343 |
| work_keys_str_mv |
AT martijavierguillermo chaoticdiffusioninthegliese876planetarysystem AT cincottapablomiguel chaoticdiffusioninthegliese876planetarysystem AT beaugecristian chaoticdiffusioninthegliese876planetarysystem |
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Repositorios |
| _version_ |
1764820491357388802 |