SIMBAD references

We present constraints on the evolution of the virial to stellar mass ratio of galaxies with high stellar masses in the redshift range 0.2 < z < 0.8, by comparing weak lensing measurements of virial mass M_vir with estimates of stellar mass M_star. For a complete sample of galaxies with log(M_star/M_☉) > 10.5, where the majority show an early-type morphology, we find that the virial mass to stellar mass ratio is given by M_vir/M_star= 53⁺¹³_–16. Assuming a baryon fraction from the concordance cosmology, this corresponds to a stellar fraction of baryons in massive galaxies of Ω*_b/Ω_b= 0.10±0.03. Analysing the galaxy sample in different redshift slices, we find little or no evolution in the virial to stellar mass ratio, and place an upper limit of ∼2.5 on the growth of massive galaxies through the conversion of gas into stars from z = 0.8 to the present day.