IP Eridani: A surprising long-period binary system hosting a He white dwarf T. Merle, A. Jorissen, T. Masseron, S. Van Eck, L. Siess and H. Van Winckel A&A, 567 (2014) A30 Published online: 08 July 2014 DOI: 10.1051/0004-6361/201423800