@Article{CostaRibeCarv:2018:ShVeDi,
author = "Costa, A. P. and Ribeiro, A. L. B. and Carvalho, Reinaldo Ramos
de",
affiliation = "{Universidade Estadual de Santa Cruz} and {Universidade Estadual
de Santa Cruz} and {Instituto Nacional de Pesquisas Espaciais
(INPE)}",
title = "The shape of velocity dispersion profiles and the dynamical state
of galaxy clusters",
journal = "Monthly Notices of the Royal Astronomical Society",
year = "2018",
volume = "473",
pages = "L31--L35",
keywords = "galaxies: clusters: general.",
abstract = "Motivated by the existence of the relationship between the
dynamical state of clusters and the shape of the velocity
dispersion profiles (VDPs), we study the VDPs for Gaussian (G) and
non-Gaussian (NG) systems for a subsample of clusters from the
Yang catalogue. The groups cover a redshift interval of 0.03
\≤ z \≤ 0.1 with halo mass \≥1014 M. We use a
robust statistical method, Hellinger Distance, to classify the
dynamical state of the systems according to their velocity
distribution. The stacked VDP of each class, G and NG, is then
determined using either Bright or Faint galaxies. The stacked VDP
for G groups displays a central peak followed by a monotonically
decreasing trend which indicates a predominance of radial orbits,
with the Bright stacked VDP showing lower velocity dispersions in
all radii. The distinct features we find in NG systems are
manifested not only by the characteristic shape of VDP, with a
depression in the central region, but also by a possible higher
infall rate associated with galaxies in the Faint stacked VDP.",
doi = "10.1093/mnrasl/slx156",
url = "http://dx.doi.org/10.1093/mnrasl/slx156",
issn = "0035-8711 and 1365-2966",
language = "en",
targetfile = "costa_shape.pdf",
urlaccessdate = "26 abr. 2024"
}