Spectral-based k-corrections and implications for the colour-magnitude relation of E/S0s and its evolution

Nathan Roche, Mariangela Bernardi, Joseph Hyde

We select a sample of 70378 E/S0 (early-type) galaxies at 0<z<0.36 from the Sloan Digital Sky Survey, excluding disk and star-forming galaxies. We estimate g and r magnitudes in th…