The Infrared Emission Bands. III. Southern IRAS Sources
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.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- June 1989
- DOI:
- Bibcode:
- 1989ApJ...341..246C
- Keywords:
-
- Abundance;
- Aromatic Compounds;
- Infrared Astronomy Satellite;
- Infrared Spectra;
- Planetary Nebulae;
- Signal To Noise Ratios;
- Southern Sky;
- Wavelengths;
- Astrophysics;
- INFRARED: SPECTRA;
- INTERSTELLAR: MOLECULES;
- NEBULAE: H II REGIONS;
- NEBULAE: REFLECTION;
- NEBULAE: PLANETARY;
- NEBULAE: ABUNDANCES