%0 Book Section
%@mirrorrepository urlib.net/www/2011/03.29.20.55
%4 sid.inpe.br/mtc-m21b/2016/08.25.16.28
%A Tortora, C.,
%A La Barbera, F.,
%A Napolitano, N. R.,
%A Romanowsky, A. J.,
%A Ferreras, I.,
%A Carvalho, Reinaldo Ramos de,
%@secondarytype PRE LI
%B The universe of digital sky surveys
%D 2016
%E Napolitano, Nicola R.,
%E Longo, Giuseppe,
%E Marconi, Marcella,
%E Paolilo, Maurizio,
%E Iodice, Enrichetta,
%@secondarykey INPE--/
%I Springer
%K Isotherms, Surveys Dark matter halos, Effective radius, Fitting parameters, Galaxy formations, Mass densities, Smallest systems, Systematic variation, Two-component.
%O Conference on Universe of Digital Sky Surveys, 2014; Naples; Italy; 25 - 28 Nov. 2014.
%P 215-218
%S Astrophysics and Space Science Proceedings
%T Systematic variation of central mass density slope in early-type galaxies
%V 42
%X 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.
%@area CEA
%@electronicmailaddress ctortora@na.astro.it
%@electronicmailaddress
%@electronicmailaddress
%@electronicmailaddress
%@electronicmailaddress
%@electronicmailaddress reinaldo@das.inpe.br
%@documentstage not transferred
%@group
%@group
%@group
%@group
%@group
%@group DAS-CEA-INPE-MCTI-GOV-BR
%@dissemination BNDEPOSITOLEGAL
%@isbn 978-331919329-8
%@usergroup simone
%@resumeid
%@resumeid
%@resumeid
%@resumeid
%@resumeid
%@resumeid 8JMKD3MGP5W/3C9JJ5B
%@nexthigherunit 8JMKD3MGPCW/3ETR8EH
%@affiliation Osservatorio Astronomico di Capodimonte
%@affiliation Osservatorio Astronomico di Capodimonte
%@affiliation Osservatorio Astronomico di Capodimonte
%@affiliation San José State University
%@affiliation University College London
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@versiontype publisher
%@holdercode {isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S}
%@doi 10.1007/978-3-319-19330-4_33
%2 sid.inpe.br/mtc-m21b/2016/08.25.16.28.05