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Master's Dissertation
DOI
https://doi.org/10.11606/D.14.1997.tde-17052002-193402
Document
Author
Full name
Fernando Virgilio Roig
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 1997
Supervisor
Committee
Mello, Sylvio Ferraz de (President)
Cordeiro, Ricardo Reis
Michtchenko, Tatiana Alexandrovna
Title in Portuguese
Mapeamentos Simpléticos em Dinâmica Asteroidal
Keywords in Portuguese
caos
integradores numéricos
problema de N corpos: função perturbadora
ressonâncias
Sistema Solar: asteróides
transformações canônicas
Abstract in Portuguese
Neste trabalho, desenvolvemos um mapeamento simplético que nos permite estudar o comportamento dinâmico de ressonâncias asteroidais no âmbito do problema dos três corpos restrito, elíptico, espacial. Para obter este mapeamento, combinamos um esquema simplético similar ao desenvolvido por Hadjidemetriou (1986) junto com o desenvolvimento assimétrico da função perturbadora (Ferraz-Mello, 1987), que leva em conta as inclinações do perturbado e do perturbador como sendo referidas a um plano invariante (Roig et al., 1997). Este mapeamento é aplicado aos casos das ressonâncias asteroidais 2/1 e 3/2. Estudam-se um grande número de condições iniciais no espaço de fase, de forma a conseguir tirar conclusões de tipo estatístico sobre os processos envolvidos na geração de mecanismos difusivos que podem agir nessas ressonâncias.
Title in English
Symplectic mappings in asteroidal dynamics
Keywords in English
canonical transformations
chaos
N-body problem: disturbing function
numerical integrators
resonances
Solar System: asteroids
Abstract in English
In this work, we developed a symplectic mapping which allow us to study the dynamical behaviour of asteroidal resonances in the frame of the non-planar elliptic restricted three-body problem. To obtain such a mapping we combine a symplectic scheme similar to that of Hadjidemetriou (1986) together with an asymmetric expansion of the disturbing funtion (Ferraz-Mello, 1987) which takes into account the inclinations of both the perturber and the disturbed bodies (Roig et al., 1997). This mapping is applied to the 2/1 and 3/2 mean motion resonances in the asteroidal belt. We explore a wide range of initial conditions in the phase space in order to get a large number of results which allow us to make some statistical conclusions about the generation of diffusion mechanisms acting in these resonances.
 
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MScDissert.pdf (3.95 Mbytes)
Publishing Date
2004-03-16
 
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