%0 Journal Article
%T Long period sdB + MS binaries with Mercator
%A J. Vos
%A R. H. £¿stensen
%A H. Van Winckel
%J Physics
%D 2013
%I arXiv
%X The predicted orbital period distribution of the subdwarf-B (sdB) population is bi-modal with a peak at short (< 10 days) and long (> 250 days) periods. Observationally, many short-period sdB systems are indeed known. The predicted long period peak is missing and orbits have only been determined for a few long-period systems. As these predictions are based on poorly understood binary-interaction processes, it is of prime importance to confront the predictions to well-constrained observational data. We therefore initiated a monitoring program to find and characterize long-period sdB stars with the 1.2 m Mercator telescope. Here we present the results of this program.
%U http://arxiv.org/abs/1310.0189v1