Spectral components of NGC 4151.
Abstract
Near-infrared spectrophotometry of NGC 4151 shows lines of B-gamma and forbidden-line Fe II. Accurate differential photometry at 10 microns indicates no variation greater than 8%, with changes in near-infrared and nonthermal flux of a factor of two or more. These observations are combined with previously published ones to construct a comprehensive model for the continuum of the nucleus of this galaxy. For wavelengths longer than 1 micron, the continuum is dominated by thermal reradiation by dust. Reddening by this dust strongly influences the observed properties of the nonthermal continuum and the relative emission-line strengths.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- November 1981
- DOI:
- 10.1086/159350
- Bibcode:
- 1981ApJ...250...87R
- Keywords:
-
- Astronomical Models;
- Galactic Nuclei;
- Infrared Spectra;
- Interstellar Matter;
- Seyfert Galaxies;
- Spectrophotometry;
- Continuous Radiation;
- Cosmic Dust;
- Interstellar Extinction;
- Nonthermal Radiation;
- Red Shift;
- Spectrum Analysis;
- Astrophysics;
- Infrared Spectra:Seyfert Galaxies;
- Interstellar Matter:Seyfert Galaxies;
- Seyfert Galaxies:Spectrophotometry