Found: High Surface Brightness Compact Galaxies
  We are using the 2dF spectrograph to make a survey of all objects (`stars' and `galaxies') in a 12 sq.deg region towards the Fornax cluster. We have discovered a population of compact emission-line galaxies unresolved on photographic sky survey plates and therefore missing in most galaxy surveys based on such material. These galaxies are as luminous as normal field galaxies. Using H-alpha to estimate star formation they contribute at least an additional 5 per cent to the local star formation rate. 
M. J. Drinkwater (1), S. Phillipps (2), J. B. Jones (2), M. D. Gregg   (3), Q. A. Parker (4), R. M. Smith (5), J. I. Davies ...