@InCollection{TortoraLaNaRoFeCa:2016:SyVaCe,
author = "Tortora, C. and La Barbera, F. and Napolitano, N. R. and
Romanowsky, A. J. and Ferreras, I. and Carvalho, Reinaldo Ramos
de",
title = "Systematic variation of central mass density slope in early-type
galaxies",
booktitle = "The universe of digital sky surveys",
publisher = "Springer",
year = "2016",
editor = "Napolitano, Nicola R. and Longo, Giuseppe and Marconi, Marcella
and Paolilo, Maurizio and Iodice, Enrichetta",
pages = "215--218",
note = "Conference on Universe of Digital Sky Surveys, 2014; Naples;
Italy; 25 - 28 Nov. 2014.",
keywords = "Isotherms, Surveys Dark matter halos, Effective radius, Fitting
parameters, Galaxy formations, Mass densities, Smallest systems,
Systematic variation, Two-component.",
abstract = "We study the total density distribution in the central regions
(\≾.1 effective radius, Re) of early-type galaxies (ETGs),
using data from the SPIDER survey (La Barbera et al., MNRAS
408:1313, 2010). We model each galaxy with two components (dark
matter halo + stars), exploring different assumptions for the dark
matter (DM) halo profile, and leaving stellar mass-to-light (M*=L)
ratios as free fitting parameters to the data. For a Navarro et
al. (ApJ 462:563, 1996) profile, the slope of the total mass
profile is non-universal. For the most massive and largest ETGs,
the profile is isothermal in the central regions (~Re=2), while
for the lowmass and smallest systems, the profile is steeper than
isothermal, with slopes similar to those for a constant-M=L
profile. For a concentration-mass relation steeper than that
expected from simulations, the correlation of density slope with
mass tends to flatten. Our results clearly point to a non-homology
in the total mass distribution of ETGs, which simulations of
galaxy formation suggest may be related to a varying role of
dissipation with galaxy mass.",
affiliation = "{Osservatorio Astronomico di Capodimonte} and {Osservatorio
Astronomico di Capodimonte} and {Osservatorio Astronomico di
Capodimonte} and {San Jos{\'e} State University} and {University
College London} and {Instituto Nacional de Pesquisas Espaciais
(INPE)}",
doi = "10.1007/978-3-319-19330-4_33",
url = "http://dx.doi.org/10.1007/978-3-319-19330-4_33",
isbn = "978-331919329-8",
language = "en",
seriestitle = "Astrophysics and Space Science Proceedings",
volume = "42",
urlaccessdate = "03 maio 2024"
}