Evolução de partículas de poeira ejetadas de Phoebe e Iapetus
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Data
2022-03-09
Autores
Moura, Vanessa Maria Francisco de [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
Saturno possui um sistema de anéis bastante diverso e atualmente são conhecidos 82 satélites orbitando o planeta. Em muitos casos a origem e evolução dos anéis estão intimamente ligadas à interação com alguns satélites. Por exemplo, Verbiscer, Skrutskie e Hamilton (2009) estudaram a manutenção do anel de Phoebe a partir da ejeção e posterior evolução orbital de partículas de poeira geradas por colisões de corpos interplanetários com os satélites de Saturno; além disso, analisaram o transporte de algumas partículas do tamanho de centímetros desse anel e possível colisão com Iapetus. Neste trabalho, analisamos os mecanismos de transporte e destino de partículas ejetadas dos satélites de Saturno. Para a geração e evolução da poeira serão levadas em conta as forças de Lorentz, pressão de radiação solar, gravidade solar, gravidade dos satélites, arrasto de Poynting-Robertson, arrasto de plasma e efeitos gravitacionais da não esfericidade de Saturno. A fim de estudar a evolução orbital das partículas ejetadas pelos satélites, realizaremos simulações numéricas utilizando o pacote REBOUND (REIN; SPIEGEL, 2015), do sistema envolvendo Saturno, seus satélites e partículas micrométricas, levando em conta a influência de todas as forças citadas acima, além das colisões mútuas entre partículas, colisões de partículas com os satélites e com o planeta. Com isso podemos observar a evolução orbital das partículas e o transporte de material entre as famílias de satélites.
Saturn has a very diverse ring system and there are 82 known satellites orbiting the planet. In many cases the origin and evolution of rings are closely linked to interaction with some satellites. For example, Verbiscer, Skrutskie e Hamilton (2009) studied the maintenance of Phoebe’s ring from ejection and later orbital evolution of dust particles generated by body collisions interplanetary with the Saturn’s satellites; besides, they analyzed the transport of some centimeter-sized particles from this ring and possible collision with Iapetus. In this work, we analyze the transport and fate mechanisms of particles ejected from Saturn’s satellites. For the generation and evolution of the dust, Lorentz forces will be taken into consideration, solar radi- ation pressure, solar gravity, satellite gravity, Poynting-Robertson’s drag, plasma drag and gravitational effects of the non-sphericity of Saturn. In order to study the orbital evolution of particles ejected by satellites, we will perform numerical simulations using the REBOUND package (REIN; SPIEGEL, 2015), of the system involving Saturn, its satellites and micrometric particles, considering the influence of all the forces mentioned above, in addition to collisions mutuals between particles, collisions of particles with satellites and with the planet. Thereby we can observe the orbital evolution of the particles and the transport of material between the families of satellites.
Saturn has a very diverse ring system and there are 82 known satellites orbiting the planet. In many cases the origin and evolution of rings are closely linked to interaction with some satellites. For example, Verbiscer, Skrutskie e Hamilton (2009) studied the maintenance of Phoebe’s ring from ejection and later orbital evolution of dust particles generated by body collisions interplanetary with the Saturn’s satellites; besides, they analyzed the transport of some centimeter-sized particles from this ring and possible collision with Iapetus. In this work, we analyze the transport and fate mechanisms of particles ejected from Saturn’s satellites. For the generation and evolution of the dust, Lorentz forces will be taken into consideration, solar radi- ation pressure, solar gravity, satellite gravity, Poynting-Robertson’s drag, plasma drag and gravitational effects of the non-sphericity of Saturn. In order to study the orbital evolution of particles ejected by satellites, we will perform numerical simulations using the REBOUND package (REIN; SPIEGEL, 2015), of the system involving Saturn, its satellites and micrometric particles, considering the influence of all the forces mentioned above, in addition to collisions mutuals between particles, collisions of particles with satellites and with the planet. Thereby we can observe the orbital evolution of the particles and the transport of material between the families of satellites.
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Palavras-chave
Saturno, Transporte, Satélites, Saturn, Transport, Satellites, Satélites - Órbitas, Astronomia, Poeira cósmica, Sistema solar