| Texto completo | |
| Autor(es): |
Monteiro-Oliveira, R.
;
Lima Neto, G. B.
;
Cypriano, E. S.
;
Machado, R. E. G.
;
Capelato, H. V.
;
Lagana, T. F.
;
Durret, F.
;
Bagchi, J.
Número total de Autores: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Monthly Notices of the Royal Astronomical Society; v. 468, n. 4, p. 4566-4578, JUL 2017. |
| Citações Web of Science: | 7 |
| Resumo | |
The galaxy cluster Abell 3376 is a nearby ((z) over bar = 0.046) dissociative merging cluster surrounded by two prominent radio relics and showing an X-ray comet-like morphology. The merger system is comprised of the subclusters A3376W and A3376E. Based on new deep multiwavelength large-field images and published redshifts, we bring new insights about the history of this merger. Despite the difficulty of applying the weak lensing technique at such low redshift, we successfully recovered the mass distribution in the cluster field. Moreover, with the application of a two-body model, we have addressed the dynamics of this merging system. We have found the individual masses of M-200(W) = 3.0(-1.7)(+1.3) x 10(14) M-circle dot and M-200(E) = 0.9(-0.8)(+0.5) x 10(14) M-circle dot. The cometary-shaped X-ray distribution shows only one peak spatially coincident with both eastern BCG and the A3376E mass peak whereas the gas content of A3376W seems to be stripped out. Our data allowed us to confirm the existence of a third subcluster located at the north, 1147 +/- 62 kpc apart from the neighbour subcluster A3376E and having a mass M-200(N) = 1.4(-1.0)(+0.7) x 10(14) M-circle dot. From our dynamical analysis, we found the merging is taking place very close to the plane of the sky, with the merger axis just 10 degrees +/- 11 degrees from it. The application of a two-body analysis code showed that the merging cluster is seen 0.9+ 0.2 -0.3 Gyr after the pericentric passage and it is currently going to the point of maximum separation between the subclusters. (AU) | |
| Processo FAPESP: | 12/00578-0 - Distribuição da matéria em aglomerados de galáxias: uma visão completa dos bárions nas maiores estruturas virializadas do universo |
| Beneficiário: | Tatiana Ferraz Laganá |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |
| Processo FAPESP: | 09/54006-4 - Um cluster de computadores para o Departamento de Astronomia do IAG-USP e para o Núcleo de Astrofísica da UNICSUL |
| Beneficiário: | Elisabete Maria de Gouveia Dal Pino |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Equipamentos Multiusuários |
| Processo FAPESP: | 14/13723-3 - Aglomerados de galáxias como portais para o universo escuro |
| Beneficiário: | Eduardo Serra Cypriano |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 10/12277-9 - Simulações numéricas de colisões de aglomerados de galáxias |
| Beneficiário: | Rubens Eduardo Garcia Machado |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |