The Infrared Emission Bands. III. Southern IRAS Sources
Tielens, A. G. G. M.; Allamandola, L. J.; Cohen, Martin; Jourdain de Muizon, M.; Bregman, Jesse; Witteborn, Fred C.; Rank, David M.; Wooden, Dianne
United States
Abstract
Airborne 5-8-micron spectra of southern IRAS sources are presented which display the strong PAH emission features. The sources studied include those in a previous paper (Cohen et al, 1986) and NGC 6302, HR 4049, and CPD -56 deg 8032. A good correlation is found between the intensity ratio of the 7.7-micron feature relative to the FIR dust continuum and nebular C/O ratio, supporting a carbonaceous carrier for these emission features. In addition, a weak PAH band is detected near 5.2 microns in several sources.