In this work, we present the first results of an ongoing survey to search for planetary nebulae (PNe) around hot subdwarf stars (sdOs). Deep images and intermediate-resolution long-slit spectra of RWT 152, the only confirmed PN+sdO system in the northern hemisphere, as well as preliminary results for other sdO+PN candidate are presented.
@article{arxiv.1212.5412,
title = {Rule or exception? Planetary nebulae around hot subdwarf stars},
author = {A. Aller and L. F. Miranda and A. Ulla and R. Oreiro and M. Manteiga and E. Pérez and C. Rodríguez-López},
journal= {arXiv preprint arXiv:1212.5412},
year = {2012}
}