Surhud MORE
(Kavli IPMU)
Halos are often defined as regions enclosing a fixed overdensity with respect to a reference density, which evolves with redshift. This causes haloes to grow in mass with time, even without any physical accretion, an effect which we call "pseudo-evolution" of halo mass. We show that for halos of mass M<1E13 Msun, pseudo-evolution dominates the mass growth since z~1. I will discuss how pseudo-evolution affects the physical interpretation of the evolution of different scaling relations. In this talk, I will particularly focus on the physical interpretation of the halo mass-stellar mass relationship and its evolution derived from COSMOS.