Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...250..517b&link_type=abstract
Astrophysical Journal, Part 1, vol. 250, Nov. 15, 1981, p. 517-527. Research supported by the Carnegie Institution of Washingto
Astronomy and Astrophysics
Astrophysics
15
Astronomical Maps, Disk Galaxies, Galactic Structure, Hydrogen Ions, Ion Distribution, Astronomical Spectroscopy, Data Acquisition, Data Reduction, Galactic Evolution, Mass Distribution, Rotating Disks, Spiral Galaxies, Velocity Distribution, Warpage
Scientific paper
An Arecibo 21 cm H I map of the S0 galaxy NGC 4203 is presented. The distribution of gas in the outer parts of the galaxy is observed to be asymmetric, and is inferred to be asymmetric near the center. The velocity field indicates a rotating disk with a flat rotation curve, although it is distorted in a manner suggesting an oval distortion or a kinematic warp. Integrated parameters of NGC 4203 from the Arecibo data are in good agreement with those observed by Knapp et al. (1977), and the observed kinematic and gas distribution properties of the H I disk are shown to be very similar to those of warped spiral galaxies such as NGC 2841. The similarities suggest that the H I distributions in the two early-type galaxies have the same origin as the H I distribution in spirals.
Burstein David
Krumm Nathan
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