Near-infrared image of NGC 1068 - Bar-driven star formation and the circumnuclear composition

Journal Article · Tue Aug 01 00:00:00 EDT 1989 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/167693· OSTI ID:5594989

Thronson, Jr, H A; Greenhouse, M; Johnson, P; Hereld, M; Majewski, S ^[1]

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1. Wyoming Infrared Observatory, Laramie (USA)

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. 57 refs.

• OSTI ID: 5594989
• Journal Information: Astrophysical Journal; (USA), Vol. 343; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
GALAXY NUCLEI
NEAR INFRARED RADIATION
SEYFERT GALAXIES
COSMIC DUST
COSMIC GASES
EMISSION SPECTRA
IMAGES
INFRARED SPECTRA
INTERSTELLAR SPACE
MASS
MOLECULES
MORPHOLOGY
STAR EVOLUTION
DUSTS
ELECTROMAGNETIC RADIATION
FLUIDS
GALAXIES
GASES
INFRARED RADIATION
RADIATIONS
SPACE
SPECTRA
640105* - Astrophysics & Cosmology- Galaxies