Chaos in growing bar models

Autor(es)

Antonio Carita, Lucas ^{[1, 2, 3]} ; Rodrigues, Irapuan ^[1] ; Puerari, I ^[2] ; Aranha Schiavo, Luiz Eduardo Camargo ^{[4, 1]}

Afiliação do(s) autor(es)

^[1] Univ Vale Paraiba UNIVAP, Sao Jose Dos Campos, SP - Brazil

^[2] INAOE, Puebla - Mexico

^[3] Inst Fed Educ Ciencia & Tecnol Sao Paulo IFSP, Sao Jose Dos Campos, SP - Brazil

^[4] Univ Estadual Campinas, UNICAMP, Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA; v. 55, n. 2, p. 321-335, OCT 2019.
• Citações Web of Science: 0

Resumo

ABSTRACT This paper aims to verify the influence of the bar, its pattern speed (Ω b ) and its rate of growth on the stability of the orbits in gravitational potentials. We studied the nature of the orbits in potentials representing galaxies with growing bars, where a linear growth was assumed. In order to study the stability of the orbits we applied SALI. We studied six models in which the bar dimensions were fixed, but we varied their pattern speed and time of bar growth. We found that when the bar growth is faster, more chaos is generated and we also noted that the higher the Ω b , the greater its influence on the system dynamics. The initial positions of the orbits that became chaotic were located in a well-defined ring-like region, confined between the ILR and CR resonances. There was also an indication that the retrograde orbits, although much scarcer, are more conductive to chaos when they do exist. (AU)

• Processo FAPESP: 13/17247-9 - Dinâmica de galáxias discoidais isoladas e em interação via simulações de N-Corpos/SPH
• Beneficiário: Irapuan Rodrigues de Oliveira Filho
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 11/13250-0 - Modelo mínimo da superfície de nanopartículas metálicas e aglomerados para otimização de nanosensores de DNA
• Beneficiário: Priscila Pereira Fávero
• Modalidade de apoio: Auxílio à Pesquisa - Regular