A preliminary look at the empirical mass distribution of hot B subdwarf stars G. Fontaine, P. Brassard, S. Charpinet, E. M. Green, S. K. Randall and V. Van Grootel A&A, 539 (2012) A12 Published online: 17 February 2012 DOI: 10.1051/0004-6361/201118220