Extinction in infrared-emitting galactic nuclei.
Abstract
Fourteen galaxies have been surveyed for a silicate feature at 10 microns by using filter photometry. The finding of silicates in many classes of galaxy indicates that thermal radiation from dust is a common emission mechanism for galaxies with 10-micron excesses. Near-infrared observations are used to supplement the 10-micron data, and a study of NGC 6946 at 2 microns demonstrates that its nucleus is so heavily obscured that the true location of the nucleus cannot be determined from optical data.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- April 1979
- DOI:
- 10.1086/156934
- Bibcode:
- 1979ApJ...229..111L
- Keywords:
-
- Galactic Nuclei;
- Galactic Radiation;
- Infrared Astronomy;
- Infrared Spectra;
- Interstellar Extinction;
- Absorption Spectra;
- Astronomical Maps;
- Cosmic Dust;
- Graphs (Charts);
- Astrophysics;
- Extinction:Galactic Nuclei;
- Galactic Nuclei:Infrared Photometry;
- Galactic Nuclei:Infrared Spectra