A substellar component orbiting the F-star 30 Arietis B E. W. Guenther, M. Hartmann, M. Esposito, A. P. Hatzes, F. Cusano and D. Gandolfi A&A, 507 3 (2009) 1659-1665 Published online: 24 September 2009 DOI: 10.1051/0004-6361/200912112