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Near-infrared image of NGC 1068 - Bar-driven star formation and the circumnuclear composition
Thronson, Harley A., Jr.; Hereld, Mark; Majewski, Steven; Greenhouse, Matthew; Johnson, Paul; Spillar, Earl; Woodward, C. E.; Harper, D. A.; Rauscher, Bernard J.
AA(Wyoming Infrared Observatory, Laramie), AB(Wyoming Infrared Observatory, Laramie), AC(Wyoming Infrared Observatory, Laramie), AD(Chicago, University, IL), AE(Yerkes Observatory, Williams Bay, WI)
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 343, Aug. 1, 1989, p. 158-168. (ApJ Homepage)
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NASA/STI Keywords:
Active Galactic Nuclei, Infrared Astronomy, Infrared Imagery, Near Infrared Radiation, Seyfert Galaxies, Star Formation, Barred Galaxies, Emission Spectra, Infrared Spectra, Interstellar Matter, Molecular Clouds
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Consideration is given to differences in images of the core of the Seyfert galaxy NGC 1068 at different wavelength regimes dominated by stellar photospheric emission. A stellar bar is observed at 1.6 and 2.2 microns, but not at shorter visual wavelength observations. Two explanations for these differences are examined: substantial stellar population variations with position and the effects of dust obscuration. The relation of the bar to active star formation is discussed. The mass of the central disk and bar is estimated at 2-3 X 10 to the 10th solar masses. It is found that the rate of star formation (100 solar masses/yr) is due to a large mass of molecular gas.

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