Estudo dinâmico e simulações hidrodinâmicas do jato da galáxia cD NGC 6166 (3C 338) no aglomerado de galáxias Abell 2199

• Ano de defesa: 2022
• Autor(a) principal: Antas, Abraão da Silva Rodrigues
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Cidade de São Paulo; Brasil; Pós-Graduação; Programa de Pós-Graduação Mestrado em Astrofísica e Física Computacional; UNICID
• Palavras-chave em Português: Rádio galáxia; Galáxia cD NGC 6166; Rádio fonte 3C 338; Simulações hidrodinâmicas; Abell 2199; CNPQ::CIENCIAS EXATAS E DA TERRA::ASTRONOMIA
• Link de acesso: https://repositorio.cruzeirodosul.edu.br/handle/123456789/4138

In the central region of the Abell 2199 galaxy cluster resides the cD galaxy NGC 6166, which spatially coincides with the 3C 338 radio source. Lobe, jets, and a more detached southern structure (similar to a jet labelled as "ridge") are seen at arcsecond-scale images of 3C 338. This unusual morphology has led to the proposition of different hypotheses about its physical origin in the literature. One of the proposed physical scenarios considers the orbital motion of the source 3C 338 around a common barycenter with NGC 6166B, one of the galaxies identified in the vicinity of the source 3C 338. Another scenario proposed here considers an orbital motion around the dark matter potential well of of Abell 2199. In this work we will describe the orbits using observational constraints provided in previous works studying the feasibility of both scenarios from the point of view of three-dimensional hydrodynamic simulations. The physical characteristics of the intra-cluster medium in which the jet propagates is constrained to those inferred from X-ray observations in the vicinity of NGC 6166. Synthetic maps are generated from the simulations, taking into account the system’s orientation effects with relation to the line of sight. Our results show that the hypothesis of the movement of NGC 6166, and hence of its active core over a few tens of millions of years, is compatible with the general morphology of 3C 338 inferred by interferometric observations on waves of radio. Furthermore, we propose a dynamic scenario in which the motion of NGC 6166 could be linked to gravitational perturbations induced by the passage of a subcluster of galaxies hundreds of millions of years ago, which is corroborated by X-ray observations of Abell 2199.