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Title:
Spectral components of NGC 4151
Authors:
Rieke, G. H.; Lebofsky, M. J.
Affiliation:
AA(Steward Observatory; Arizona, University, Tucson, AZ), AB(Steward Observatory, Tucson, AZ)
Publication:
Astrophysical Journal, Part 1, vol. 250, Nov. 1, 1981, p. 87-97. NSF-supported research. (ApJ Homepage)
Publication Date:
11/1981
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
ASTRONOMICAL MODELS, GALACTIC NUCLEI, INFRARED SPECTRA, INTERSTELLAR MATTER, SEYFERT GALAXIES, SPECTROPHOTOMETRY, CONTINUOUS RADIATION, COSMIC DUST, INTERSTELLAR EXTINCTION, NONTHERMAL RADIATION, RED SHIFT, SPECTRUM ANALYSIS
Comment:
A&AA ID. AAA030.158.174
DOI:
10.1086/159350
Bibliographic Code:
1981ApJ...250...87R

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.

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