R. S. Gomes

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Publications (2)1.46 Total impact

  • Source
    Article: On the Stability of the Satellites of Asteroid 87 Sylvia
    O. C. Winter, L. A. G. Boldrin, E. Vieira Neto, R. Vieira Martins, S. M. Giuliatti Winter, R. S. Gomes, F. Marchis, P. Descamps
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    ABSTRACT: he triple asteroidal system (87) Sylvia is composed of a 280-km primary and two small moonlets named Romulus and Remus (Marchis et al 2005). Sylvia is located in the main asteroid belt. The satellites are in nearly equatorial circular orbits around the primary. In the present work we study the stability of the satellites Romulus and Remus, in order to identify the effects and the contribution of each perturber. The results from the 3-body problem, Sylvia-Romulus-Remus, show no significant variation of their orbital elements. However, the inclinations of the satellites present a long period evolution, when the Sun is included in the system. Such amplitude is amplified when Jupiter is included. An analysis of these results show that Romulus and Remus are librating in a secular resonance and their longitude of the nodes are locked to each other. The satellites get caught in an evection resonance with Jupiter. However, the orbital evolutions of the satellites became completely stable when the oblateness of Sylvia is included in the simulations. Comment: 11 pages, 8 figures and 1 table
    02/2009;
  • Article: A mapping for nonconservative systems
    R. R. Cordeiro, R. S. Gomes, R. Vieira Martins
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    ABSTRACT: We present a method to construct a mapping for perturbed systems, in which the perturbations do not need to be conservative. We use a variation of Wisdom and Holman's method, where the dissipative term is placed together with the other perturbative terms. The method is applied for two dissipative systems: one including gas drag and the other including Poynting-Robertson drag. We compare the results with those obtained by Malhotra's mapping. Because the dissipative part in our method is treated as a regular perturbative term, there is no need for analytical developments of the nonconservative terms. This is a great advantage in itself and this also allows for a fast performance of the integrator.
    Celestial Mechanics and Dynamical Astronomy 11/1996; 65(4):407-419. · 1.46 Impact Factor
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