Abstract
We present mapping, profiles and photometry for 24 planetary nebulae (PNe) detected in the GLIMPSE 3D mid-infrared (MIR) survey of the Galactic plane. This has involved mapping the shells in the 3.6, 4.5, 5.8 and 8.0 bands, as well as obtaining profiles through the nuclei, and maps of flux ratio parameters. The PNe show many of the properties observed in previous studies of these sources, including evidence for longer wave emission from outside of the ionised zones, a likely consequence of emission from polycyclic aromatic hydrocarbons (PAHs) within the nebular photo-dissociation regimes (PDRs). We also note variations in 5.8μm/4.5μm and 8.0μm/4.5μm flux ratios with distance from the nuclei, and present evidence for enhanced MIR emission in the halos of the sources -- 5.8 and 8.0μm halo surface brightnesses, when compared to maximal values within the nuclei, appear to be >10 times greater than are observed in the visible.
