Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...250...87r&link_type=abstract
Astrophysical Journal, Part 1, vol. 250, Nov. 1, 1981, p. 87-97. NSF-supported research.
Astronomy and Astrophysics
Astrophysics
110
Astronomical Models, Galactic Nuclei, Infrared Spectra, Interstellar Matter, Seyfert Galaxies, Spectrophotometry, Continuous Radiation, Cosmic Dust, Interstellar Extinction, Nonthermal Radiation, Red Shift, Spectrum Analysis
Scientific paper
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.
Lebofsky Marcia J.
Rieke George H.
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