Recombination spectrum and reddening in NGC 1068.
Abstract
Measurements of the emission-line intensities of NGC 1068 have been made over the wavelength range extending from rest wavelengths equal to 1216 A to 1.875 micron. The data, plus other available emission-line data, can be explained in terms of a simple model where the emission lines are formed in an H II region, and the line ratios are consistent with those predicted by standard radiative recombination theory and reddening corresponding to 0.4 mag. The continuum flux is seen to consist of a galaxy component plus a nonstellar component which dominates the observed flux in the ultraviolet. The observed ultraviolet continuum does not show an absorption dip caused by the intertellar 2200 A feature nor does it contain enough energy to power the observed infrared flux.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- June 1980
- DOI:
- 10.1086/158006
- Bibcode:
- 1980ApJ...238..502N
- Keywords:
-
- Galactic Nuclei;
- Interstellar Extinction;
- Optical Emission Spectroscopy;
- Radiative Recombination;
- Seyfert Galaxies;
- Continuous Spectra;
- Data Reduction;
- H Ii Regions;
- Infrared Spectra;
- Iue;
- Radiant Flux Density;
- Spectral Energy Distribution;
- Ultraviolet Spectra;
- Astrophysics