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

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

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...348..456e&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 348, Jan. 10, 1990, p. 456-466.

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32

Astronomical Models, Barred Galaxies, Kinematics, Radio Galaxies, Astronomical Spectroscopy, Dynamic Models, Galactic Mass, Galactic Structure, Gas Density, Mass Distribution

Scientific paper

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.

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