Galaxy number counts-V . Ultra-deep counts : The Herschel and Hubble Deep Fields

We present u, b, r & i galaxy number counts and colours both from the North and South Hubble Space Telescope Deep Fields and from the William Herschel Deep Field. The latter comprises a 7 × 7 area of sky reaching b ∼28.5 at its deepest. Following Metcalfe et al. (1996) we show that simple Bruzual & Charlot evolutionary models which assume exponentially… (More)