Revisiting the bulge-halo conspiracy I: Dependence on galaxy properties and halo mass

摘要: We carry out a systematic investigation of the total mass density profile massive (Mstar>2e11 Msun) early-type galaxies and its dependence on galactic properties host halo with aid variety lensing/dynamical data large mock galaxy catalogs. The latter are produced via semi-empirical models that, by design, based just few basic input assumptions. Galaxies, measured stellar masses, effective radii S\'{e}rsic indices, assigned, abundance matching relations, dark matter halos characterized typical LCDM profile. Our main results as follows: (i) In line observational evidence, our naturally predict that total, mass-weighted slope at radius gamma' is not universal, steepening for more compact and/or galaxies, but flattening increasing mass. (ii) Models Salpeter or variable initial function uncontracted profiles in good agreement data, while Chabrier adiabatic contractions/expansions highly disfavored. (iii) Currently available very (Mstar>1e12 Msun), Mhalo>3e14 Msun, favor instead flatter than one inner regions (r<3-5 kpc), cored NFW Einasto median concentration factor ~2 <1.3, respectively, higher those typically predicted N-body numerical simulations.