Wide binaries in planetary nebulae with Gaia DR2 I. González-Santamaría, M. Manteiga, A. Manchado, M. A. Gómez-Muñoz, A. Ulla and C. Dafonte A&A, 644 (2020) A173 Published online: 16 December 2020 DOI: 10.1051/0004-6361/202039422