SHARDS/CANDELS faint galaxies in GOODS-N

Virtually none of these galaxies are contained in previous public catalogs, effectively doubling the number of known sources in the field. The sample was constructed by stacking the optical broadband observations taken by the HST/GOODS-CANDELS surveys, as well as the 25 ultradeep medium-band images gathered by the GTC/SHARDS project.

Our sources are faint (average observed magnitudes <i>~28.2 and <H>~27.9mag), blue (UV slope <{beta}>~-1.9), star-forming (rest-frame colors <U-V>~0.10 and <V-J>~0.17mag) galaxies. These observational characteristics are identified with young (mass-weighted age <t_M-w_>~0.014Gyr) stellar populations subject to low attenuations (<A(V)>~0.30mag). Our sample allows us to probe the MS down to 10^8.0^M_{sun}_ at z=1 and 10^8.5^M_{sun}_ at z=3, around 0.6dex deeper than previous analyses.