We present near-infrared photometry of a large sample of planetary nebulae (PNe) and show that the IJK colours are a good tool to distinguish different classes of PNe, like nebulae around symbiotic Miras or IR-[WC] PNe from genuine PNe.
@article{arxiv.astro-ph/0202124,
title = {DENIS Survey Data Probing Different Types of PNe},
author = {S. Schmeja and S. Kimeswenger},
journal= {arXiv preprint arXiv:astro-ph/0202124},
year = {2007}
}
Comments
2 pages, 1 figure; Proceedings of IAU Symposium 209 "Planetary Nebulae: Their Evolution and Role in the Universe", in press