author = "Tortora, C. and La Barbera, F. and Napolitano, N. R. and 
                         Romanowsky, A. J. and Ferreras, I. and Carvalho, Reinaldo Ramos 
                title = "Systematic variation of central mass density slope in early-type 
            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 
                  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 = "04 dez. 2020"