@Article{CarvalhoRiStRoCoMo:2017:InReGa,
author = "Carvalho, Reinaldo Ramos de and Ribeiro, A. L. B. and Stalder
Diaz, Diego Herbin and Rosa, Reinaldo Roberto and Costa, A. P. and
Moura, Tatiana Coelho de",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Universidade Estadual Santa Cruz} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Universidade Estadual Santa Cruz} and
{Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Investigating the relation between galaxy properties and the
gaussianity of the velocity distribution of groups and clusters",
journal = "The Astronomical Journal",
year = "2017",
volume = "154",
number = "3",
month = "Sept.",
keywords = "evolution, galaxies: clusters: general, galaxies: formation,
galaxies: groups: general.",
abstract = "We investigate the dependence of stellar population properties of
galaxies on group dynamical stage for a subsample of the Yang
catalog. We classify groups according to their galaxy velocity
distribution into Gaussian (G) and Non-Gaussian (NG). Using two
totally independent approaches, we have shown that our measurement
of Gaussianity is robust and reliable. Our sample covers Yang's
groups in the redshift range 0.03 <= z <= 0.1, with mass >=
10(14)M(circle dot). The new method, called Hellinger Distance, to
determine whether a group has a velocity distribution Gaussian or
NG is very effective in distinguishing between the two families.
NG groups present halo masses higher than the G ones, confirming
previous findings. Examining the skewness and kurtosis of the
velocity distribution of G and NG groups, we find that faint
galaxies in NG groups are mainly infalling, for the first time,
into the groups. We show that considering only faint galaxies in
the outskirts; those in NG groups are older and more metal-rich
than those in G groups. Also, examining the Projected Phase Space
of cluster galaxies, we see that bright and faint galactic systems
in G groups are in dynamical equilibrium-which does not seem to be
the case in NG groups. These findings suggest that NG systems have
a higher infall rate, assembling more galaxies that have
experienced preprocessing before entering the group.",
doi = "10.3847/1538-3881/aa7f2b",
url = "http://dx.doi.org/10.3847/1538-3881/aa7f2b",
issn = "0004-6256",
language = "en",
targetfile = "carvalho_investigating.pdf",
urlaccessdate = "27 abr. 2024"
}