Rubin-LSST

Abstract:

Using a new radio sample, 6C* designed to find radio galaxies at z > 4 along with the complete 3CRR and 6CE sample we extend the radio galaxy K - z relation to z similar to 4.5. The 6C* K - z data significantly improve delineation of the K - z relation for radio galaxies at high redshift (z > 2). In a spatially flat universe with a cosmological constant (Omega(M) = 0.3 and Omega(A) = 0.7), the most luminous radio sources appear to be associated with galaxies with a luminosity distribution with a high mean (approximate to 5L*), and a low dispersion (sigma similar to 0.5 mag) which formed their stars at epochs corresponding to z greater than or similar to 2.5).

Abstract:

To initiate this discussion I raised five topics (i) the physical mechanisms that give rise to the global relationships observed in early type galaxies, (ii) the origin of the environmental dependences of galaxy properties such as morphology and mean age, (iii) lessons from galaxy populations in intermediate redshift clusters, (iv) the role of black holes in galaxy evolution and (v) the order of formation of different galactic subcomponents. Comments and questions ranged over these and other issues and a lively discussion ensued.