Abstract
We use the Hubble Ultra Deep Field to study the galaxy luminosity‐size (M‐Re) distribution. With a careful analysis of selection effects due to both detection completeness and measurement reliability, we identify bias-free regions in the M‐Re plane for a series of volume-limited samples. By comparison to a nearby survey also having well-defined selection limits, namely the Millennium Galaxy Catalogue, we present clear evidence for evolution in surface brightness since z ∼ 0.7. Specifically, we demonstrate that the mean, rest-frame B-band � μ� e for galaxies in a sample spanning 8 mag in luminosity between MB =− 22 and −14 mag increases by ∼1.0 mag arcsec −2 from z ∼ 0.1 to 0.7. We also highlight the importance of considering surface
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