High-resolution observations, kinematics, and dynamics of the barred spiral NGC 1073

Journal Article · Sun Dec 31 23:00:00 EST 1989 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168254· OSTI ID:6956028

England, M N; Gottesman, S T; Hunter, Jr, J H ^[1]

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1. Florida Univ., Gainesville (USA)

High spatial resolution neutral hydrogen observations of the barred spiral galaxy NGC 1073 are used to map the kinematics and gas density with a velocity resolution of about 12 km/sec. The kinematics indicate that the galaxy is seen nearly face-on, i.e., at an inclination of about 18 deg. The rotation curve and mass distribution models indicate that the features of a truncation signature may be present in NGC 1073. Other notable features in the H I are the lack of spiral features, the presence of a gas bar, and the very good circular symmetry. Dynamical models that reproduce the H I observations are constrained by the large-scale structure and kinematics of gas, and by the near-infrared morphology of the bar. Different aspects of observations, data reduction and analysis, and dynamical modeling of NGC 1073 are discussed. The dynamical components considered are (1) an asymmetric n = 0 Toomre disk, (2) a triaxial stellar bar, and (3) an oval distortion of the axisymmetric disk. 28 refs.

• OSTI ID: 6956028
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 348; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC GASES
COSMIC RADIO SOURCES
DENSITY
DISTRIBUTION
DYNAMICS
FLUIDS
GALAXIES
GASES
H1 REGIONS
MASS
MASS DISTRIBUTION
MATHEMATICAL MODELS
MECHANICS
MORPHOLOGY
PARTICLE KINEMATICS
PHYSICAL PROPERTIES
RADIO GALAXIES
SPATIAL DISTRIBUTION
SPECTROSCOPY