Rotation and magnetic activity of the Hertzsprung-gap giant 31 Comae K. G. Strassmeier, T. Granzer, M. Kopf, M. Weber, M. Küker, P. Reegen, J. B. Rice, J. M. Matthews, R. Kuschnig, J. F. Rowe et al. (5 more) A&A, 520 (2010) A52 Published online: 04 October 2010 DOI: 10.1051/0004-6361/201015023