| Texto completo | |
| Autor(es): |
Lagana, T. F.
[1]
;
Souza, G. S.
[1]
;
Machado, R. E. G.
[2]
;
Volert, R. C.
[2]
;
Lopes, P. A. A.
[3]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] Univ Cidade Sao Paulo, Univ Cruzeiro do Sul, Nucleo Astrofis, Rua Galvao Bueno 868, BR-01506000 Sao Paulo, SP - Brazil
[2] Univ Tecnol Fed Parana, Dept Acad Fis, Rua Sete Setembro 3165, BR-80230901 Curitiba, Parana - Brazil
[3] Univ Fed Rio de Janeiro, Observ Valongo, Ladeira Pedro Antonio 43, BR-20080090 Rio De Janeiro, RJ - Brazil
Número total de Afiliações: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Monthly Notices of the Royal Astronomical Society; v. 487, n. 3, p. 3922-3934, AUG 2019. |
| Citações Web of Science: | 0 |
| Resumo | |
We present a detailed analysis of two merging clusters, from XMM-Newton X-ray archival data: PLCKESZ G036.7+14.9 (z = 0.15; hereafter 6036) and PLCK G292.5+22.0 (z = 0.30; hereafter G292). We notice that the intracluster medium (ICM) is heated as a result of the merger, and we find evidence for a merger shock in the region between both subcluster haloes. X-ray observations confirm that the shocks in these systems are among the hottest known in the literature. From the ICM analysis of temperature discontinuity, the Mach numbers were determined to be M-G036 = 1.3 +/- 0.1 and M-G292 = 1.47 +/- 0.08 for G036 and G292, respectively. In this paper, for each cluster, we propose a hydrodynamic model for the merger as a whole, compatible with their diffuse X-ray emission and temperature maps. The simulations suggest that both clusters are observed shortly before pericentric passage. Our simulation results indicate that the merger of the G036 system is seen at an inclination of 50 degrees (the angle between the plane of the orbit and the plane of the sky), and merely 50 Myr prior to the pericentric passage. In the case of G292, the subclusters would be merging not far from the plane of the sky (i = 18 degrees) and are observed 150 Myr before the two cores collide, (AU) | |
| 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: | 18/02626-8 - Astrofísica de Raios-X: o histórico de enriquecimento químico de grupos e aglomerados de galáxias |
| Beneficiário: | Tatiana Ferraz Laganá |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |