The post-common envelope central stars of the planetary nebulae Henize 2-155 and Henize 2-161 D. Jones, H. M. J. Boffin, P. Rodríguez-Gil, R. Wesson, R. L. M. Corradi, B. Miszalski and S. Mohamed A&A, 580 (2015) A19 Published online: 22 July 2015 DOI: 10.1051/0004-6361/201425454