Properties of hot subdwarfs in the GALEX survey
arXiv:1208.6226
Abstract
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.
8 pages, 5 figures, published in the proceedings of the Fifth Meeting on Hot Subdwarf Stars and Related Objects