SIMBAD references

We derive the mass-weighted total density slopes within the effective (half-light) radius, γ', for more than 2000 nearby galaxies from the SDSS-IV (Sloan Digital Sky Survey IV) MaNGA survey using Jeans-anisotropic-models applied to integral field unit observations. Our galaxies span a wide range of the stellar mass (10⁹ M_☉ < M_* < 10¹² M_☉) and the velocity dispersion (30 km s^–1 < σ_v < 300 km s^–1). We find that for galaxies with velocity dispersion σ_v > 100 km s^–1, the density slope has a mean value <γ'> = 2.24 and a dispersion σ_γ = 0.22, almost independent of velocity dispersion, consistent with previous lensing and stellar dynamical analysis. We also quantitatively confirm with high accuracy a turnover in the γ'-σ_v relation is present at σ ∼ 100 km s^–1, below which the density slope decreases rapidly with σ_v, consistent with the results reported by previous analysis of ATLAS^ 3D^ survey. Our analysis shows that a large fraction of dwarf galaxies (below M_* = 10¹⁰ M_☉) have total density slopes shallower than 1, which implies that they may reside in cold dark matter haloes with shallow density slopes. We compare our results with that of galaxies in hydrodynamical simulations of EAGLE, Illustris, and IllustrisTNG projects, and find all simulations predict shallower density slopes for massive galaxies with high σ_v. Finally, we explore the dependence of γ' on the positions of galaxies in haloes, namely centrals versus satellites, and find that for the same velocity dispersion, the amplitude of γ' is higher for satellite galaxies by about 0.1.