  We have analyzed a sample of hot subdwarfs (sdB, sdO) selected from the GALEX
ultraviolet sky survey. Applying a model atmosphere analysis we determined the
temperature, surface gravity, and helium-to-hydrogen abundance ratio, and
obtained preliminary constraints on the CNO abundance for a sample of 181
stars. Adopting colourimetric (ultraviolet-infrared) and quantitative spectral
decomposition we also investigated the incidence of solar type or earlier (A,
F, G) companions.
