Bibcode
                                    
                            Alonso Asensio, Isaac; Dalla Vecchia, Claudio; Bahé, Yannick M.; Barnes, David J.; Kay, Scott T.
    Bibliographical reference
                                    Monthly Notices of the Royal Astronomical Society
Advertised on:
    
                        4
            
                        2020
            
  Citations
                                    67
                            Refereed citations
                                    58
                            Description
                                    By using deep observations of clusters of galaxies, it has been recently found that the projected stellar mass density closely follows the projected total (dark and baryonic) mass density within the innermost ∼140 kpc. In this work, we aim to test these observations using the Cluster-EAGLE simulations, comparing the projected densities inferred directly from the simulations. We compare the iso-density contours using the procedure of Montes & Trujillo, and find that the shape of the stellar mass distribution follows that of the total matter even more closely than observed, although their radial profiles differ substantially. The ratio between stellar and total matter density profiles in circular apertures shows a slope close to −1, with a small dependence on the cluster's total mass. We propose an indirect method to calculate the halo mass and mass density profile from the radial profile of the intracluster stellar mass density.
                            Related projects
                 
Numerical Astrophysics: Galaxy Formation and Evolution
            
    How galaxies formed and evolved through cosmic time is one of the key questions of modern astronomy and astrophysics. Cosmological time- and length-scales are so large that the evolution of individual galaxies cannot be directly observed. Only through numerical simulations can one follow the emergence of cosmic structures within the current
            
            Claudio
            
                        Dalla Vecchia