| Texto completo | |
| Autor(es): |
Ceccatto, Demetrio Tadeu
;
Callegari, Nelson
;
Guimaraes, Gabriel Teixeira
;
Gimenez, Karyna
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Planetary and Space Science; v. 255, p. 17-pg., 2024-12-18. |
| Resumo | |
This study comprehensively analyzes Atlas's current orbit, focusing on the secular and resonant perturbations caused by Prometheus, Pandora, and Saturn's oblateness. We performed numerical integration of the exact equations of motion fora dense ensemble of Atlas clone satellites. Through spectral analysis and interpretation of these orbits on dynamical maps, we identified the domain of the 54:53 Prometheus-Atlas and 70:67 Pandora-Atlas mean-motion resonances, showing that Atlas lies on the boundary of the separatrices of each of these resonances. We also identified the domains for the multiplets Psi 1, Psi 2, Psi 3 and Psi 4 associated with 70:67 resonance. Additionally, we explored the variation in Prometheus's eccentricity, demonstrating that as eccentricity increases (or decreases) in the 54:53 resonance domain correspondingly decreases (or increases). This combined analysis, between the above mappings, revealed qualitatively the overlap between the 54:53 and 70:67 resonances, which are responsible for the chaotic behavior of Atlas's orbit. We quantified chaotic motion infrequency space and found that the vicinity of Atlas is characterized by weak to moderate chaos, rather than strong chaos. Finally, we investigated Atlas's recent past, considering Prometheus's migration under the influence of Saturn's tidal forces. This analysis reveals several resonances crossed in the past, particularly focusing on the Atlas-Prometheus pair, which exhibited a co-orbital configuration. (AU) | |
| Processo FAPESP: | 20/06807-7 - Dinâmica ressonante de pequenos satélites e partículas no sistema interior de Saturno |
| Beneficiário: | Nelson Callegari Júnior |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |