Spatial studies of the middle infrared spectral features in NGC 7027

Open Access
Publisher Website
Google Scholar
Abstract
We report high spatial resolution spectral observations of the planetary nebula NGC 7027 in the 10 µm region. These show that the unidentified infrared features at 8.65 and 11.25 µm originate from a more extensive region than the shell of ionized gas; the data are consistent with these features arising entirely from the contiguous neutral region. This situation places further constraints upon a fluorescent excitation mechanism (Allamandola, Greenberg & Norman 1979) and it is argued that the features are due to thermal emission from surface bonds on graphite grains in an H I region (Barlow 1982, in preparation; Dwek et al. 1980).

This publication has 0 references indexed in Scilit: