@Article{NascimentoRiTrCaPlDu:2016:DyAnCl,
author = "Nascimento, R. S. and Ribeiro, A. L. B. and Trevisan, Marina and
Carrasco, E. R. and Plana, H. and Dupke, R.",
affiliation = "{Universidade Federal do Rio de Janeiro (UFRJ)} and {Universidade
Estadual Santa Cruz (UESC)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Gemini Observatory} and {Universidade
Estadual Santa Cruz (UESC)} and {Observatorio Nacional (ON)}",
title = "Dynamical analysis of the cluster pair: A3407+A3408",
journal = "Monthly Notices of the Royal Astronomical Society",
year = "2016",
volume = "460",
number = "2",
pages = "2193--2206",
month = "Aug.",
keywords = "galaxies: clusters: general, galaxies: clusters: intracluster
medium, galaxies: evolution, galaxies: statistics.",
abstract = "We carried out a dynamical study of the galaxy cluster pair A3407
and A3408 based on a spectroscopic survey obtained with the 4
metre Blanco telescope at the Cerro Tololo Interamerican
Observatory, plus 6dF data, and ROSAT All-Sky Survey. The sample
consists of 122 member galaxies brighter than m(R) = 20. Our main
goal is to probe the galaxy dynamics in this field and verify if
the sample constitutes a single galaxy system or corresponds to an
ongoing merging process. Statistical tests were applied to
clusters members showing that both the composite system A3407 +
A3408 as well as each individual cluster have Gaussian velocity
distribution. A velocity gradient of similar to 847 +/- A 114 km
s(- 1) was identified around the principal axis of the projected
distribution of galaxies, indicating that the global field may be
rotating. Applying the kmm algorithm to the distribution of
galaxies, we found that the solution with two clusters is better
than the single unit solution at the 99 per cent cl. This is
consistent with the X-ray distribution around this field, which
shows no common X-ray halo involving A3407 and A3408. We also
estimated virial masses and applied a two-body model to probe the
dynamics of the pair. The more likely scenario is that in which
the pair is gravitationally bound and probably experiences a
collapse phase, with the cluster cores crossing in less than
similar to 1 h(-1) Gyr, a pre-merger scenario. The complex X-ray
morphology, the gas temperature, and some signs of galaxy
evolution in A3408 suggest a post-merger scenario, with cores
having crossed each other similar to 1.65 h(-1) Gyr ago, as an
alternative solution.",
doi = "10.1093/mnras/stw1114",
url = "http://dx.doi.org/10.1093/mnras/stw1114",
issn = "0035-8711 and 1365-2966",
language = "en",
targetfile = "nascimento_dynamical.pdf",
urlaccessdate = "27 abr. 2024"
}