Aperture Synthesis of Neutral Hydrogen in the Galaxy M33,
OWENS VALLEY RADIO OBSERVATORY PASADENA CALIF
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Observations of the neutral hydrogen in the galaxy M33 with resolutions of 2 and 10 kms are described. Detailed modeling has revealed weak evidence for spiral density waves with an arm-interarm contrast of 3 to 2 and a corotation radius in the range 7 to 12. There is substantial evidence for large-scale warping of the plane of this galaxy in its outer extremities similar to that found in M83.